Electrochemically induced spinel-layered phase transition of Mn3O4 in high performance neutral aqueous rechargeable zinc battery

被引：332

作者：

Hao, Jianwu ^{[1
,2
]}

Mou, Jian ^{[1
,2
]}

Zhang, Jingwen ^{[1
,2
]}

Dong, Liubing ^{[1
,2
]}

Liu, Wenbao ^{[1
,2
]}

Xu, Chengjun ^{[1
]}

Kang, Feiyu ^{[1
,2
]}

机构：

[1] Tsinghua Univ, Grad Sch Shenzhen, Shenzhen 518055, Peoples R China

[2] Tsinghua Univ, Sch Mat Sci & Engn, Beijing 100084, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2018年 / 259卷

关键词：

Rechargeable zinc battery; Spinel-Mn3O4; Mn3+ oxidation; Birnessite; Zinc ion intercalation; MANGANESE-DIOXIDE; ENERGY-STORAGE; CRYSTAL WATER; HIGH-CAPACITY; INTERCALATION; CATHODE; TRANSFORMATION; ALPHA-MNO2; BIRNESSITE; MECHANISM;

D O I：

10.1016/j.electacta.2017.10.166

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

070208 [无线电物理];

摘要：

Mn3O4 is an electrochemically inactive in alkaline Zn-MnO2 battery. Here, we show that Mn3O4 shows superior electrochemical performance in mild aqueous zinc sulfate electrolytes. Mn3O4 can be a new cathode material for neutral aqueous rechargeable zinc battery. Results reveal that spinel Mn3O4 transforms to intermediate Mn5O8 and finally to Zn-birnessite. The initial charge cycle proceeds without participation of zinc ions, while zinc ions participate in the subsequent reaction. The intercalation of zinc ions into the interlamination of birnessite leads to the generation of Zn-birnessite in discharge process, accompanied by the reduction of Mn-4(+) to Mn-3(+). Our results demonstrate a new manganese oxide cathode with average Mn valence state lower than four for rechargeable zinc batteries. (c) 2017 Elsevier Ltd. All rights reserved.

引用

页码：170 / 178

页数：9

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