High-Performance Quasi-Solid-State Na-Air Battery via Gel Cathode by Confining Moisture

被引:37
作者
Chang, Shilei [1 ]
Hou, Minjie [1 ]
Xu, Bowen [1 ]
Liang, Feng [1 ,2 ]
Qiu, Xuechao [1 ]
Yao, Yaochun [1 ]
Qu, Tao [1 ]
Ma, Wenhui [1 ]
Yang, Bing [1 ]
Dai, Yongnian [1 ]
Chen, Kunfeng [3 ]
Xue, Dongfeng [3 ]
Zhao, Huaping [4 ,5 ]
Lin, Xiaoting [6 ]
Poon, Fanny [6 ]
Lei, Yong [4 ,5 ]
Sun, Xueliang [6 ]
机构
[1] Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Yunnan, Peoples R China
[2] Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Yunnan, Peoples R China
[3] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
[4] Tech Univ Ilmenau, Inst Phys, Unterporlitzer Str 38, D-98693 Ilmenau, Germany
[5] Tech Univ Ilmenau, IMN MacroNano, Unterporlitzer Str 38, D-98693 Ilmenau, Germany
[6] Univ Western Ontario, Dept Mech & Mat Engn, London, ON N6A 5B9, Canada
基金
中国国家自然科学基金; 加拿大自然科学与工程研究理事会;
关键词
gel cathodes; moisture; quasi‐ solid‐ state Na‐ air battery; state Na;  O; (2) battery; state electrolytes; CARBON NANOTUBES; SODIUM; EFFICIENCY; CELL;
D O I
10.1002/adfm.202011151
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Rechargeable Na-air batteries are the subject of great interest because of their high theoretical specific energy density, lower cost, and lower charge potential compared with Li-air batteries. However, high purity O-2 as a working environment is required to achieve high-performance Na-air batteries, which obstructs their application as a high-energy-density battery. Although aqueous Na-air batteries can operate in ambient air, long cycle and high safety remain challenges for aqueous Na-air batteries because the aqueous electrolyte is volatile. Here, a quasi-solid-state Na-air battery is reported by utilizing a gel cathode, which is composed of single-walled carbon nanotubes and room-temperature ionic liquids, achieving high safety and long cycling life of 125 cycles (528 h) at a current density of 0.1 mA cm(-2), which is surprisingly better than that of quasi-solid-state Na-O-2 batteries. In situ XRD characterizations reveal that water in ambient air is gradually deposited on the surface of the gel cathode to form a water layer, which facilitates the generation of soluble discharge product of NaOH thermodynamically with high conductivity. This work shall be critical to develop and promote the practical application of Na-air batteries, opening a new way to the design of solid-state metal-air batteries.
引用
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页数:9
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