High‐Performance Aqueous Rechargeable Li‐Ni Battery Based on Ni(OH)2/NiOOH Redox Couple with High Voltage |
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| Authors: | Ming Zhang Zheng Huang Zhongrong Shen Yingpeng Gong Bo Chi Jian Pu Jian Li |
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| Affiliation: | 1. Center for Fuel Cell Innovation, State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science & Technology, Wuhan, China;2. Materials and Chemical Engineering, Faculty of Textile Science and Technology, Shinshu University, Ueda, Japan;3. Shanxi Province Key Laboratory of Functional Nanocomposite Materials, School of Materials Science and Engineering, North University of China, Taiyuan, China |
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| Abstract: | New energy storage and conversion systems require large‐scale, cost‐effective, good safety, high reliability, and high energy density. This study demonstrates a low‐cost and safe aqueous rechargeable lithium‐nickel (Li‐Ni) battery with solid state Ni(OH)2/NiOOH redox couple as cathode and hybrid electrolytes separated by a Li‐ion‐conductive solid electrolyte layer. The proposed aqueous rechargeable Li‐Ni battery exhibits an approximately open‐circuit potential of 3.5 V, outperforming the theoretic stable window of water 1.23 V, and its energy density can be 912.6 W h kg‐1, which is much higher than that of state‐of‐the‐art lithium ion batteries. The use of a solid‐state redox couple as cathode with a metallic lithium anode provides another postlithium chemistry for practical energy storage and conversion. |
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| Keywords: | hybrid aqueous lithium batteries lithium ion conductors Ni‐MH redox couples |
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