Reversible aqueous zinc/manganese oxide energy storage from conversion reactions

Huilin Pan, Yuyan Shao, Pengfei Yan, Yingwen Cheng, Kee Sung Han, Zimin Nie, Chongmin Wang, Jihui Yang, Xiaolin Li, Priyanka Bhattacharya, Karl T. Mueller, Jun Liu

Research output: Contribution to journalArticle

656 Scopus citations

Abstract

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 ZnSO 4 -based solution is used as the electrolyte, and nanofibres of a manganese oxide phase, α-MnO 2, are used as the cathode. We show that a chemical conversion reaction mechanism between α-MnO 2 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 (MnO 2), 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.

Original languageEnglish (US)
Article number16039
JournalNature Energy
Volume1
DOIs
StatePublished - Mar 4 2016

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology

Fingerprint Dive into the research topics of 'Reversible aqueous zinc/manganese oxide energy storage from conversion reactions'. Together they form a unique fingerprint.

Cite this