期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 49, 页码 42717-42722出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b13110
关键词
vanadium pentoxide; aqueous hybrid-ion battery; high voltage platform; high energy density; water-in-salt electrolyte
资金
- National Key Research and Development Program of China [2016YFA0202603]
- National Basic Research Program of China [2013CB934103]
- Programme of Introducing Talents of Discipline to Universities [B17034]
- National Natural Science Foundation of China [51521001, 21673171, 51502226]
- National Natural Science Fund for Distinguished Young Scholars [51425204]
- Fundamental Research Funds for the Central Universities [WUT: 2016III001, 2016III002]
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing [WUT: 2017-KF-2]
- China Scholarship Council [201606955096]
Aqueous zinc-ion batteries attract increasing attention due to their low cost, high safety, and potential application in stationary energy storage. However, the simultaneous realization of high cycling stability and high energy density remains a major challenge. To tackle the above-mentioned challenge, we develop a novel Zn/V2O5 rechargeable aqueous hybrid-ion battery system by using porous V2O5 as the cathode and metallic zinc as the anode. The V2O5 cathode delivers a high discharge capacity of 238 mAh g(-1) at 50 mA g(-1). 80% of the initial discharge capacity can be retained after 2000 cycles at a high current density of 2000 mA g(-1). Meanwhile, the application of a water-in-salt electrolyte results in the increase of discharge platform from 0.6 to 1.0 V. This work provides an effective strategy to simultaneously enhance the energy density and cycling stability of aqueous zinc ion-based batteries.
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