Wu Jialong, Zheng Yongshuo, Zhang Pengfei, Rao Xiaoshuang, Zhang Zhenyu, Wu Jin-Ming, Wen Wei
Collaborative Innovation Center of Ecological Civilization, School of Mechanical and Electrical Engineering, Hainan University, Haikou 570228, China.
State Key Laboratory of High-performance Precision Manufacturing, Dalian University of Technology, Dalian 116024, China.
Research (Wash D C). 2024 Aug 27;7:0461. doi: 10.34133/research.0461. eCollection 2024.
Seawater batteries are attracting continuous attention because seawater as an electrolyte is inexhaustible, eco-friendly, and free of charge. However, the rechargeable seawater batteries developed nowadays show poor reversibility and short cycle life, due to the very limited electrode materials and complicated yet inappropriate working mechanism. Here, we propose a rechargeable seawater battery that works through a rocking-chair mechanism encountered in commercial lithium ion batteries, enabled by intercalation-type inorganic electrode materials of open-framework-type cathode and Na-ion conducting membrane-type anode. The rechargeable seawater battery achieves a high specific energy of 80.0 Wh/kg at 1,226.9 W/kg and a high specific power of 7,495.0 W/kg at 23.7 Wh/kg. Additionally, it exhibits excellent cycling stability, retaining 66.3% of its capacity over 1,000 cycles. This work represents a promising avenue for developing sustainable aqueous batteries with low costs.
海水电池正不断受到关注，因为海水作为电解质取之不尽、环保且免费。然而，由于电极材料非常有限以及工作机制复杂且不合适，目前开发的可充电海水电池显示出较差的可逆性和较短的循环寿命。在此，我们提出一种可充电海水电池，其通过在商用锂离子电池中遇到的摇椅式机制工作，由开放框架型阴极的插层型无机电极材料和钠离子传导膜型阳极实现。该可充电海水电池在1226.9W/kg时实现了80.0Wh/kg的高比能量，在23.7Wh/kg时实现了7495.0W/kg的高比功率。此外，它表现出优异的循环稳定性，在1000次循环中保持其容量的66.3%。这项工作为开发低成本的可持续水系电池提供了一条有前景的途径。
