- March. 2015 – Aug. 2018: PhD of Materials Science
Advisor: Prof. Guoxiu Wang
Centre for Clean Energy Technology, University of Technology, Sydney
- Nov. 2017 – Aug: 2018: Visiting PhD Candidate (Materials Science)
Co-Advisor: Prof. Yury Gogosti
- Sep. 2011 – May. 2014: Master of Engineering (Nonferrous metallurgy)
Advisor: Prof. Zhian Zhang
School of Metallurgy & Environment, Central South University, Changsha, China
- Sep. 2007 – Jun. 2011: Bachelor of Engineering (Metallurgy)
Advisor: Prof. Yongmao Zhou
School of Metallurgy & Environment, Central South University, Changsha, China
Honors and Awards
- Jul. 2017 Winner of “Paper of the Month Award”, Faculty of Science
- Feb. 2017 UTS VC Conference Fund
- Sep. 2016 Winner of “Paper of the Month Award”, Faculty of Science
- Feb. 2015 International Research Scholarship (UTS IRS)
- Feb. 2014 Hunan Province “Outstanding Graduate Student”
- Sep. 2013 Postgraduate National Scholarship
- Sep. 2012 “XIAN DAO” Scholarship
- Nov. 2012 Top 4th in Graduate Basketball Competition of CSU
- Bao, W. ; Liu, L.; Wang, C.; Choi, S.; Wang, D.; Wang, G., 2018. Facile Synthesis of Crumpled Nitrogen?Doped MXene Nanosheets as a New Sulfur Host for Lithium–Sulfur Batteries. Advanced Energy Materials. Impact factor: 21.875. (Selected as cover of the issue in March 2018)
- Bao, W.; Su, D.;Zhang, W.;Guo, X.; Wang, G. 3D Metal Carbide@Mesoporous Carbon Hybrid Architecture as a New Polysulfide Reservoir for Lithium–Sulfur Batteries. Advanced Functional Materials 2016, 26, 8746-8756. Impact factor: 13.30.
- Bao, W.;Mondal, A. K.;Xu, J.;Wang, C.;Su, D.; Wang, G. Journal of Power Sources 2016, 325, 286-291. Impact factor: 6.945.
- Bao, W.; X, Xie.; Xu, J.; Guo, X.; J, Song Su, D.; Wang, G.Chemistry–A European Journal, 2017, 23, 1-8. Impact factor: 5.16.
- Bao, W., Tang, X., Guo, X., Choi, S., Wang, C., Gogotsi, Y. and Wang, G., 2018. Porous cryo-dried MXene for efficient capacitive deionization. Joule. (Cell Publishing Group: Impact factor is not available until 2019. Highlight and preview paper by editor )
- Bao, W.;Zhang, Z.;Zhou, C.;Lai, Y.; Li, J. Journal of Power Sources 2014, 248, 570-576. Impact factor: 6.945.
- Bao, W.;Zhang, Z.;Chen, W.;Zhou, C.;Lai, Y.; Li, J. Electrochimica Acta 2014, 127, 342-348. Impact factor: 5.116.
- Bao, W.;Zhang, Z.;Qu, Y.;Zhou, C.;Wang, X.; Li, J. Journal of Alloys and Compounds 2014, 582, 334-340. Impact factor: 3.779.
- Bao, W.;Zhang, Z.;Qu, Y.;Zhou, C.;Wang, X.; Li, J. Journal of Energy Chemistry, 2013, 22(5), pp.790-794. Impact factor: 4.385.
- Zhang, Z.; Bao, W.; Chen, W.;Zhou, C.;Lai, Y.; Li. ECS Electrochemistry Letters, 2012, 1(2), pp.A34-A37.
- Chen, W.;Zhang, Z.; Bao, W.; Lai, Y.;Li, J.;Gan, Y.; Wang, J. Electrochimica Acta 2014, 134, 293-301. Impact factor: 5.116.
- Xu, J.;Su, D.; Bao, W.; Wang, G. . Journal of Alloys and Compounds, 2016, 684: 691-698. Impact factor: 3.779.
- Research experiences in material preparation, characterizations, and electrochemical testing of electroactive materials for energy storage applications.
- Skilled microscopist of Transmission Electron Microscopy (TEM). Expertise on operation on JEOL FEGTEM 3000 (300KV, Atomic Resolution), JEM-2100F, JEM-2011 facilities.
- Good background on inorganic material crystal structure analysis based on the TEM and Rietveld refinement.
- Fully understand the solid state physics and skilled on Ab initio calculations based on density-functional theory (DFT).
- High proficiency with XRD, SEM/FESEM, AFM, Raman, NMR, Infra-red, UV-vis Spectroscopy.
- Proficiency in different chemical synthesis methods: hydrothermal, solid-state, co-precipitation, CVD, microwave reaction, spray pyrolysis etc.
- Skilled in electrode fabrication, cell assembly in a glovebox, various electrochemical techniques by using electrochemical workstation and battery tester facilities.
- Capabilities of data analysis and processing in an accurate and professional manner using the mathematic software, such as Matlab.
1. Synthesis and Fabrication of 3D electrode using 2D Carbides and Nitrides (MXenes) in energy storage device
- Synthesis and characterization of the MXenes@Mesoporous carbon hierarchical architecture.
- Fabrication of the composite electrodes (based on MXenes) for high-performance lithium–sulfur batteries and supercapacitors.
2. Research and application of 3D electrodes using Metal–organic frameworks (MOFs) in energy storage device
- Synthesis and characterization of Metal–organic frameworks derived carbon (MDC) (e.g. Multi–walled carbon nanotubes@mesoporous carbon hybrid nano-composites, Graphene oxide@mesoporous carbon hybrid nano-composites).
- Fabrication of hybrid electrodes (based on MOFs and MDCs materials) for high performance lithium sulfur batteries and supercapacitors.
Li, H, Chen, X, Jin, T, Bao, W, Zhang, Z & Jiao, L 2019, 'Robust graphene layer modified Na2MnP2O7 as a durable high-rate and high energy cathode for Na-ion batteries', Energy Storage Materials, vol. 16, pp. 383-390.View/Download from: UTS OPUS or Publisher's site
© 2018 Na2MnP2O7 has been considered as a promising cathode candidate for advanced sodium-ion batteries due to its high potential, low cost and non-toxicity. However, the low initial Coulombic efficiency, poor high-rate and unsatisfactory cycling ability originated from the intrinsic inferior electronic conductivity and manganese dissolution severely hinder its practical application. Herein, we report an approach based on a feasible high energy vibrating activation process to fabricate a robust graphene layers (GL) modified Na2MnP2O7 material (noted as NMP@GL) for the first time. The as-prepared NMP@GL could exhibit an ultrahigh initial Coulombic efficiency of 90%, and a high energy density over 300 Wh kg-1. In addition, rate performance and cycling stability were also improved, with high capacity retention of 83% after 600 cycles at 2 C. These impressive progresses should be ascribed to the enhanced electron transportation with distinctive framework through graphene layer modifying, and structural stability of triclinic Na2MnP2O7 with spacious 3D ion migration channels. Ex-situ XRD and GITT demonstrate a consecutive multi-phase reaction mechanism with facile sodium diffusion. Our design makes Na2MnP2O7@GL to achieve its potential for practical application.
Xiao, X, Wang, H, Bao, W, Urbankowski, P, Yang, L, Yang, Y, Maleski, K, Cui, L, Billinge, SJL, Wang, G & Gogotsi, Y 2019, 'Two-Dimensional Arrays of Transition Metal Nitride Nanocrystals.', Advanced materials (Deerfield Beach, Fla.), vol. 31, no. 33.View/Download from: UTS OPUS or Publisher's site
The synthesis of low-dimensional transition metal nitride (TMN) nanomaterials is developing rapidly, as their fundamental properties, such as high electrical conductivity, lead to many important applications. However, TMN nanostructures synthesized by traditional strategies do not allow for maximum conductivity and accessibility of active sites simultaneously, which is a crucial factor for many applications in plasmonics, energy storage, sensing, and so on. Unique interconnected two-dimensional (2D) arrays of few-nanometer TMN nanocrystals not only having electronic conductivity in-plane, but also allowing transport of ions and electrolyte through the porous nanosheets, which are obtained by topochemical synthesis on the surface of a salt template, are reported. As a demonstration of their application in a lithium-sulfur battery, it is shown that 2D arrays of several nitrides can achieve a high initial capacity of >1000 mAh g-1 at 0.2 C and only about 13% degradation over 1000 cycles at 1 C under a high areal sulfur loading (>5 mg cm-2 ).
Yang, J, Bao, W, Jaumaux, P, Zhang, S, Wang, C & Wang, G 2019, 'MXene-Based Composites: Synthesis and Applications in Rechargeable Batteries and Supercapacitors', Advanced Materials Interfaces, vol. 6, no. 8.View/Download from: UTS OPUS or Publisher's site
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim The family of 2D transition metal carbides, nitrides, and carbonitrides (collectively called MXenes) is rapidly studied since the initial synthesis of Ti3C2Tx (MXene). The surface of MXenes etched by hydrofluoric acid has hydrophilic groups (F, OH, and O), which leads the surface to be negatively charged. Consequently, the negatively charged surface can facilitate the compounding of MXenes with other positively charged materials and prevent MXenes from aggregating with some negatively charged substances, thus promoting the formation of a stable dispersion. The MXene-based composites have better electrochemical performance than both precursors due to synergistic effects. This review elaborates and discusses the development of MXene-based composites. It is aimed to summarize the various methods of fabricating MXene-based composites. The applications of MXene-based composites in batteries and supercapacitors are presented along with analysis of their excellent electrochemical performances. Finally, the authors propose the approach for further enhancing the electrochemical performances of MXene-based composite electrode materials.
Guo, X, Li, K, Bao, W, Zhao, Y, Xu, J, Liu, H & Wang, G 2018, 'Highly Reversible Lithium Polysulfide Semiliquid Battery with Nitrogen-Rich Carbon Fiber Electrodes', Energy Technology, vol. 6, no. 2, pp. 251-256.View/Download from: UTS OPUS or Publisher's site
© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Freestanding nitrogen-doped carbon fiber (NCF) webs saturated with lithium polysulfide solution were prepared as semiliquid cathodes for lithium–sulfur batteries. The NCF webs not only facilitated the transportation of electrons and ions but also immobilized the polysulfide at the cathode side because of strong affinity between the polysulfide and the N-doped carbon. As a result, these semiliquid cells demonstrated superior electrochemical performance at various current loads. A high reversible capacity of 900 mAh g−1was achieved after 200 cycles at a current rate of 1 C.
Bao, W, Tang, X, Guo, X, Choi, S, Wang, C, Gogotsi, Y & Wang, G 2018, 'Porous Cryo-Dried MXene for Efficient Capacitive Deionization', Joule, vol. 2, no. 4, pp. 778-787.View/Download from: UTS OPUS or Publisher's site
© 2018 Elsevier Inc. Aerogel-like, porous Ti 3 C 2 T x MXene architecture electrode displayed a high electroadsorption capacity for capacitive deionization of saline water. A vacuum freeze-drying process was employed to prevent the restacking of MXene nanosheets due to van der Waals forces, leading to the formation of a porous structure with a large specific surface area. When applied as electrode materials for capacitive deionization, porous MXene demonstrated a high specific capacitance of 156 F/g and a volumetric capacitance of 410 F/cm 3 in 1 M sodium chloride (NaCl) electrolyte. The porous Ti 3 C 2 T x MXene electrodes can deliver a high electroadsorption capacity of 118 mg/cm 3 (45 mg/g) in 10,000 mg/L NaCl solution (applied voltage: 1.2 V) and excellent cycling stability (up to 60 cycles) in comparison with the restacked MXene and activated carbon electrodes, indicating its promising potential for desalination applications. We report a rationally designed process to produce an aerogel-like porous MXene electrode material for capacitive deionization. The intercalation-delamination of organic compounds and a vacuum freeze-drying technique were employed to prevent the restacking of MXene nanosheets due to van der Waals forces. The porous Ti 3 C 2 T x is hydrophilic and has a well-defined porous structure with a high surface area and high electrical conductivity. When applied as electrodes in a capacitive deionization cell, porous Ti 3 C 2 T x MXene electrodes exhibited an impressively high ion adsorption capacity of 118 mg/cm 3 in a salt solution with the concentration of 10,000 mg/L, which is more than 12 times higher than previously reported carbon-based electrode materials. The porous MXene materials may open a new avenue for high-performance capacitive desalination. Porous Ti 3 C 2 T x MXene architectures were prepared and used as electrode materials with a high electrosorption capacity for capacitive deionization of saline or brackish water. The porous ...
Bao, W, Liu, L, Wang, C, Choi, S, Wang, D & Wang, G 2018, 'Facile Synthesis of Crumpled Nitrogen-Doped MXene Nanosheets as a New Sulfur Host for Lithium–Sulfur Batteries', Advanced Energy Materials, vol. 8, no. 13.View/Download from: UTS OPUS or Publisher's site
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Crumpled nitrogen-doped MXene nanosheets with strong physical and chemical coadsorption of polysulfides are synthesized by a novel one-step approach and then utilized as a new sulfur host for lithium–sulfur batteries. The nitrogen-doping strategy enables introduction of heteroatoms into MXene nanosheets and simultaneously induces a well-defined porous structure, high surface area, and large pore volume. The as-prepared nitrogen-doped MXene nanosheets have a strong capability of physical and chemical dual-adsorption for polysulfides and achieve a high areal sulfur loading of 5.1 mg cm–2. Lithium–sulfur batteries, based on crumpled nitrogen-doped MXene nanosheets/sulfur composites, demonstrate outstanding electrochemical performances, including a high reversible capacity (1144 mA h g–1 at 0.2C rate) and an extended cycling stability (610 mA h g–1 at 2C after 1000 cycles).
Li, H, Jin, T, Chen, X, Lai, Y, Zhang, Z, Bao, W & Jiao, L 2018, 'Rational Architecture Design Enables Superior Na Storage in Greener NASICON-Na4MnV(PO4)3 Cathode', Advanced Energy Materials, vol. 8, no. 24.View/Download from: Publisher's site
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Na3V2(PO4)3 has attracted great attention due to its high energy density and stable structure. However, in order to boost its application, the discharge potential of 3.3–3.4 V (vs Na+/Na) still needs to be improved and substitution of vanadium with other lower cost and earth-abundant active redox elements is imperative. Therefore, the Na superionic conductor (NASICON)-structured Na4MnV(PO4)3 seems to be more attractive due to its lower toxicity and higher voltage platform resulting from the partial substitution of V with Mn. However, Na4MnV(PO4)3 still suffers from poor electronic conductivity, leading to unsatisfactory capacity delivering and poor high-rate capability. In this work, a graphene aerogel–supported in situ carbon–coated Na4MnV(PO4)3 material is synthesized through a feasible solution-route method. The elaborately designed Na4MnV(PO4)3 can reach ≈380 Wh kg−1 at 0.5 C (1 C = 110 mAh g−1) and realize superior high-rate capability evenat 50 C (60.1 mAh g−1) with a long cycle-life of 4000 cycles at 20 C. This impressive progress should be ascribed to the multifunctional 3D carbon framework and the distinctive structure of trigonal Na4MnV(PO4)3, which are deeply investigated by both experiments and calculations.
Li, H, Zhang, Z, Xu, M, Bao, W, Lai, Y, Zhang, K & Li, J 2018, 'Triclinic Off-Stoichiometric Na3.12Mn2.44(P2O7)2/C Cathode Materials for High-Energy/Power Sodium-Ion Batteries.', ACS applied materials & interfaces, vol. 10, no. 29, pp. 24564-24572.View/Download from: UTS OPUS or Publisher's site
The application of sodium-ion batteries (SIBs) requires a suitable cathode material with low cost, nontoxic, high safety, and high energy density, which is still a big challenge; thus, a basic research on exploring new types of materials is imperative. In this work, a manganic pyrophosphate and carbon compound Na3.12Mn2.44(P2O7)2/C has been synthesized through a feasible sol-gel method. Rietveld refinement reveals that Na3.12Mn2.44(P2O7)2 adopts a triclinic structure ( P1̅ space group), which possesses spacious ion diffusion channels for facile sodium migration. The off-stoichiometric phase is able to offer more reversible Na+, delivering an enhanced reversible capacity of 114 mA h g-1 at 0.1 C, and because of the strong "inductive effect" that (P2O7)4- groups imposing on the Mn3+/Mn2+ redox couple, Na3.12Mn2.44(P2O7)2/C presents high platforms above 3.6 V, contributing a remarkable energy density of 376 W h kg-1, which is among the highest Fe-/Mn-based polyanion-type cathode materials. Furthermore, the off-stoichiometric compound also presents satisfactory rate capability and long-cycle stability, with a capacity retention of 75% after 500 cycles at 5 C. Ex situ X-ray diffraction demonstrates a single-phase reaction mechanism, and the density functional theory calculations display two one-dimensional sodium migration paths with low energy barriers in Na3.12Mn2.44(P2O7)2, which is vital for the facile sodium storage. We believe that this compound will be a competitive cathode material for large-scale SIBs.
Shanmukaraj, D, Kretschmer, K, Sahu, T, Bao, W, Rojo, T, Wang, G & Armand, M 2018, 'Highly Efficient, Cost Effective, and Safe Sodiation Agent for High-Performance Sodium-Ion Batteries.', ChemSusChem, vol. 11, no. 18, pp. 3286-3291.View/Download from: UTS OPUS or Publisher's site
The development of sodium-ion batteries has been hindered so far by the large irreversible capacity of hard carbon anodes and other anode materials in the initial few cycles, as sodium ions coming from cathode materials is consumed in the formation of the solid-electrolyte interface (SEI) and irreversibly trapped in anodes. Herein, the successful synthesis of an environmentally benign and cost-effective sodium salt (Na2 C4 O4 ) is reported that could be applied as additive in cathodes to solve the irreversible-capacity issues of anodes in sodium-ion batteries. When added to Na3 (VO)2 (PO4 )2 F cathode, the cathode delivered a highly stable capacity of 135 mAh g-1 and stable cycling performance. The water-stable Na3 (VO)2 (PO4 )2 F cathode in combination with a water-soluble sacrificial salt eliminates the need for using any toxic solvents for laminate preparation, thus paving way for greener electrode fabrication techniques. A 100 % increase in capacity of sodium cells (full-cell configuration) has been observed when using the new sodium salt at a C-rate of 2C. Regardless of the electrode fabrication technique, this new salt finds use in both aqueous and non-aqueous cathode-fabrication techniques for sodium-ion batteries.
Bao, W, Xie, X, Xu, J, Guo, X, Song, J, Wu, W, Su, D & Wang, G 2017, 'Confined Sulfur in 3 D MXene/Reduced Graphene Oxide Hybrid Nanosheets for Lithium-Sulfur Battery.', Chemistry - A European Journal, vol. 23, no. 51, pp. 12613-12619.View/Download from: UTS OPUS or Publisher's site
Three-dimensional metal carbide MXene/reduced graphene oxide hybrid nanosheets are prepared and applied as a cathode host material for lithium-sulfur batteries. The composite cathodes are obtained through a facile and effective two-step liquid-phase impregnation method. Owing to the unique 3 D layer structure and functional 2 D surfaces of MXene and reduced graphene oxide nanosheets for effective trapping of sulfur and lithium polysulfides, the MXene/reduced graphene oxide/sulfur composite cathodes deliver a high initial capacity of 1144.2 mAh g-1 at 0.5 C and a high level of capacity retention of 878.4 mAh g-1 after 300 cycles. It is demonstrated that hybrid metal carbide MXene/reduced graphene oxide nanosheets could be a promising cathode host material for lithium-sulfur batteries.
Xu, J, Su, D, Bao, W, Zhao, Y, Xie, X & Wang, G 2016, 'Rose flower-like NiCo2O4 with hierarchically porous structures for highly reversible lithium storage', JOURNAL OF ALLOYS AND COMPOUNDS, vol. 684, pp. 691-698.View/Download from: Publisher's site
Bao, W, Su, D, Zhang, W, Guo, X & Wang, G 2016, '3D Metal Carbide@Mesoporous Carbon Hybrid Architecture as a New Polysulfide Reservoir for Lithium-Sulfur Batteries', ADVANCED FUNCTIONAL MATERIALS, vol. 26, no. 47, pp. 8746-8756.View/Download from: Publisher's site
Song, J, Su, D, Xie, X, Guo, X, Bao, W, Shao, G & Wang, G 2016, 'Immobilizing Polysulfides with MXene-Functionalized Separators for Stable Lithium-Sulfur Batteries', ACS APPLIED MATERIALS & INTERFACES, vol. 8, no. 43, pp. 29427-29433.View/Download from: Publisher's site
Bao, W, Mondal, AK, Xu, J, Wang, C, Su, D & Wang, G 2016, '3D hybrid-porous carbon derived from carbonization of metal organic frameworks for high performance supercapacitors', JOURNAL OF POWER SOURCES, vol. 325, pp. 286-291.View/Download from: Publisher's site
Automotive Australia 2020 Cooperative Research Centre (AutoCRC), UOW, CSRIO, The University of Adelaide
May. 2014 – Feb. 2015: Research scientist
A123 System Asia CO., LTD, Hangzhou, China.
Working with Dr. Xinbao Gao (Cell R&D Department) as a research scientist. Research topics includeresearch in Li-ion Cell R&D and Product Development for high power battery for electronic vehicle;Technology Transfer and Exchange (US and China).
May. 2011 – May. 2014: Research assistant
Ye Xiang Advanced Energy Technology Transfer Center, Changsha, China.
Working with Prof. Yexiang Liu--member of China Engineering Academy (Institute of Light Metals and Industrial Electrochemistry (ILMIE) as aGraduate Student Researcher. Research topics include research in Porous Carbon, Metal OrganicFramework (MOF) and their applications in electrochemical energy storage
China national invention patent
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