Zhou Jinqiu, Qian Tao, Wang Zhenkang, Liu Jie, Sun Yawen, Peng Mingji, Zhu Yuanze, Li Sijie, Yan Chenglin
Soochow Institute for Energy and Materials Innovations, College of Energy, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou 215006, People's Republic of China.
School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, People's Republic of China.
Nano Lett. 2021 Jun 23;21(12):5021-5027. doi: 10.1021/acs.nanolett.1c00608. Epub 2021 Jun 2.
Effective recycling of spent Li metal anodes is an urgent need for energy/resource conservation and environmental protection, making Li metal batteries more affordable and sustainable. For the first time, we explore a unique sustainable healable lithium alloy anode inspired by the intrinsic healing ability of liquid metal. This lithium alloy anode can transform back to the liquid state through Li-completed extraction, and then the structure degradation generated during operation could be healed. Therefore, an ultralong cycle life of more than 1300 times can be successfully realized under harsh conditions of 5 mA h cm capacitance by a process of two healing behaviors. This design improves the sustainable utilization of Li metal to a great extent, bringing about unexpected effects in the field of lithium-based anodes even at an unprecedentedly high discharge current density (up to 25 mA cm) and capacity (up to 50 mA h cm).
有效回收废旧锂金属负极对于能源/资源节约和环境保护而言是迫切需求，这使得锂金属电池更具成本效益且可持续。我们首次探索了一种独特的可持续自愈锂合金负极，其灵感来源于液态金属的固有自愈能力。这种锂合金负极可通过完全提取锂转变回液态，进而修复运行过程中产生的结构退化。因此，通过两种修复行为的过程，在5 mA h cm电容的苛刻条件下可成功实现超过1300次的超长循环寿命。这种设计在很大程度上提高了锂金属的可持续利用率，即使在前所未有的高放电电流密度（高达25 mA cm）和容量（高达50 mA h cm）下，在锂基负极领域也带来了意想不到的效果。
