The low-temperature deposition of a zincophilic carbon layer on the Zn foil for long-life zinc metal batteries  

锌箔上低温沉积亲锌碳层用于长寿命锌金属电池

作　　者：LI Chun-yu ZHANG Ming-hui LANG Xin-yue CHEN Ye DONG Yan-feng 李春玉;张明慧;郎新月;陈烨;董琰峰(东北大学,理学院化学系,辽宁沈阳110819)

机构地区：[1]Department of Chemistry,College of Sciences,Northeastern University,Shenyang 110819,China

出　　处：《新型炭材料(中英文)》2025年第1期178-187,共10页New Carbon Materials

基　　金：partially supported by the National Natural Science Foundation of China(22479022);Liaoning Revitalization Talents Program(XLYC2007129)。

摘　　要：Aqueous zinc metal batteries(ZMBs)which are environmentally benign and cheap can be used for grid-scale energy storage,but have a short cycling life mainly due to the poor reversibility of zinc metal anodes in mild aqueous electrolytes.A zincophilic carbon(ZC)layer was deposited on a Zn metal foil at 450°C by the up-stream pyrolysis of a hydrogen-bonded supramolecular substance framework,as-sembled from melamine(ME)and cyanuric acid(CA).The zincophilic groups(C=O and C=N)in the ZC layer guide uniform zinc plating/stripping and eliminate dendrites and side reactions.so that assembled symmetrical batteries(ZC@Zn//ZC@Zn)have a long-term service life of 2500 h at 1 mA cm^(−2) and 1 mAh cm^(−2),which is much longer than that of bare Zn anodes(180 h).In addition,ZC@Zn//V2O5 full batteries have a higher capacity of 174 mAh g^(−1) after 1200 cycles at 2 A g^(−1) than a Zn//V_(2)O_(5) counterpart(100 mAh g^(−1)).The strategy developed for the low-temperat-ure deposition of the ZC layer is a new way to construct advanced zinc metal anodes for ZMBs.水系锌金属电池(ZMBs)具有环境友好、成本低廉的特点,可用于电网规模储能。但其具有循环寿命较短的缺点,主要原因在于锌金属负极在弱酸性水系电解液中的可逆性较差。本文通过三聚氰胺(ME)和三聚氰酸(CA)组装的氢键超分子框架(HSFs)的上游热解,在Zn箔上低温沉积了亲锌碳(ZC)层。重要的是,ZC层中的亲锌基团(如C=O和C=N)可引导均匀的锌成核/沉积,消除枝晶和副反应。因此,组装的对称电池(ZC@Zn//ZC@Zn)在1 mA cm^(-2)和1 mAh cm^(-2)的条件下可实现2500 h的长循环寿命,明显优于裸锌对称电池(180 h)。此外,在2 A g^(-1)电流密度下,组装的ZC@Zn//V_(2)O_(5)全电池循环1200次后,比容量仍高达174 mAh g^(-1),高于Zn//V_(2)O_(5)全电池(100 mAh g^(-1))。本文开发的低温沉积ZC层策略为构建高性能锌金属负极提供了新思路。

关 键 词：Aqueous zinc metal batteries Zinc metal anodes Low-temperature deposition Zincophilic carbon layer High performance 

分 类 号：TQ152[化学工程—电化学工业]