Enhancing electrochemical performance and stabilizing zinc anode in mild acidic electrolyte using combined additive

Shiva Rezaei Motlagh , Ramin Khezri , Ahmad Azmin Mohamad , Rojana Pornprasertsuk , Pinit Kidkhunthod , Mai Thanh Nguyen , Tetsu Yonezawa , Soorathep Kheawhom
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引用次数: 8

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复合添加剂提高锌阳极在弱酸性电解液中的电化学性能及稳定性
具有水性电解质的可充电锌基电池是大规模储能系统(ESS)的有前途的替代品。然而,在弱酸性电解质中,锌阳极存在一些尚未克服的问题。对于解决锌阳极的主要困难,电解质工程是最实用、最具成本效益的策略。尽管与不同的电解质添加剂相关的机理多种多样,但单一添加剂的作用是直接的。寻找具有更广泛功能和更高功效的组合添加剂至关重要。在这项工作中,离子液体(IL)1-丁基-1-甲基吡咯烷鎓二氰胺([BMPY][DCN])和乙二醇(EG)作为添加剂在水性电解质3M ZnSO4中的组合被证明是同时增强锌溶解和沉积的有效策略。IL显著增强锌(Zn)的溶解和沉积,而EG在抑制析氢反应(HER)和腐蚀方面发挥着重要作用。因此,与3M ZnSO4电解质相比,混合添加剂EG+IL/ZnSO4的容量提高了13.50%。在2 mA cm−2的Zn//Zn对称体系中,混合添加剂大大提高了锌的可循环性,达到400 h以上,同时保持了优异的库仑效率(CE)。原位XAS和FT-EXAFS分析证实了锌在混合添加剂电解质中的高氧化/还原活性。结果表明,EG+IL/ZnSO4可以在保持高性能的同时提高水性锌基电池的可循环性。
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来源期刊
Materials Science for Energy Technologies
Materials Science for Energy Technologies Materials Science-Materials Science (miscellaneous)
CiteScore
16.50
自引率
0.00%
发文量
41
审稿时长
39 days
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