Reversible aqueous zinc/manganese oxide energy storage from conversion reactions

被引：1737

作者：

Pan, Huilin ^{[1
]}

Shao, Yuyan ^{[1
]}

Yan, Pengfei ^{[2
]}

Cheng, Yingwen ^{[1
]}

Han, Kee Sung ^{[2
]}

Nie, Zimin ^{[1
]}

Wang, Chongmin ^{[2
]}

Yang, Jihui ^{[3
]}

Li, Xiaolin ^{[1
]}

Bhattacharya, Priyanka ^{[1
]}

Mueller, Karl T. ^{[4
,5
]}

Liu, Jun ^{[1
]}

机构：

[1] Pacific Northwest Natl Lab, Energy & Environm Directorate, Richland, WA 99352 USA

[2] Pacific Northwest Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA

[3] Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA

[4] Pacific Northwest Natl Lab, Phys & Computat Sci Directorate, Richland, WA 99352 USA

[5] Penn State Univ, Dept Chem, University Pk, PA 16802 USA

来源：

NATURE ENERGY | 2016年 / 1卷

关键词：

LITHIUM-ION BATTERY; LONG CYCLE LIFE; HIGH-POWER; ZINC-ION; MANGANESE-DIOXIDE; CATHODE; ELECTRODE; ALPHA-MNO2;

D O I：

10.1038/NENERGY.2016.39

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Rechargeable aqueous batteries such as alkaline zinc/manganese oxide batteries are highly desirable for large-scale energy storage owing to their low cost and high safety; however, cycling stability is a major issue for their applications. Here we demonstrate a highly reversible zinc/manganese oxide system in which optimal mild aqueous ZnSO4-based solution is used as the electrolyte, and nanofibres of a manganese oxide phase, alpha-MnO2, are used as the cathode. We show that a chemical conversion reaction mechanism between alpha-MnO2 and H+ is mainly responsible for the good performance of the system. This includes an operating voltage of 1.44 V, a capacity of 285 mAh g(-1) (MnO2), and capacity retention of 92% over 5,000 cycles. The Zn metal anode also shows high stability. This finding opens new opportunities for the development of low-cost, high-performance rechargeable aqueous batteries.

引用

页数：7

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