材料科学
电解质
电化学
阳极
法拉第效率
化学工程
溶剂化
水溶液
电极
金属
锌
分子
纳米技术
化学
物理化学
有机化学
冶金
工程类
作者
Nan Hu,Wensong Lv,Wenjian Chen,Huan Tang,Xiaoyan Zhang,Hongyu Qin,Dan Huang,Jinliang Zhu,Zhengjun Chen,Jing Xu,Huibing He
标识
DOI:10.1002/adfm.202311773
摘要
Abstract The electrochemical performance of aqueous zinc metal batteries (AZMBs) is highly dependent on the electric double layer (EDL) properties at Zn electrode/electrolyte interface. Herein, a novel reconfigured EDL is constructed via a double‐charged theanine (TN) additive for super‐stable and deep‐rechargeable AZMBs. Experiments and theoretical computations unravel that the positively charged TN not only serves as preferential anchor to form a water‐poor Helmholtz plane onto the Zn anode, but also its anionic end could coordinate with Zn 2+ to tailor the solvation structure in the diffusion layer and further reconstruct the inner H‐bonds networks, thus effectively guiding uniform Zn deposition and suppressing the water‐induced side reactions. Consequently, the Zn//Zn cells acquire outstanding cycling stabilities of nearly 800 h at a high depth of discharge of 80%. Moreover, the Zn//VOX full cells deliver substantial capacity retention (94.12% after 1400 cycles at 2 A g −1 ) under practical conditions. Importantly, the designed 2.7 Ah Zn//VOX pouch cell harvests a recorded energy density of 42.3 Wh Kg cell −1 and 79.5 Wh L cell –1 , with a remarkable capacity retention of 85.93% after 220 cycles at 50 mA g −1 . This innovative design concept to reshape the EDL chemistry would inject fresh vitality into developing advanced AZMBs and beyond.
科研通智能强力驱动
Strongly Powered by AbleSci AI