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Title: Going beyond Intercalation Capacity of Aqueous Batteries by Exploiting Conversion Reactions of Mn and Zn electrodes for Energy‐Dense Applications

Journal Article · · Advanced Energy Materials
ORCiD logo [1];  [1];  [1];  [1];  [2];  [1];  [1];  [1]
  1. Department of Chemical Engineering The CUNY Energy Institute at the City College of New York Steinman Hall Rm 316, 160 Convent Ave. New York NY 10031 USA
  2. ZPower LLC 4765 Calle Quetzal Camarillo CA 93102 USA

Abstract The recent trend in zinc (Zn) anode aqueous batteries has been to explore layered structures like manganese dioxides and vanadium oxides as Zn‐ion intercalation hosts. These structures, although novel, face limitations like their layered counterparts in lithium (Li)‐ion batteries, where the capacity is limited to the host's intercalation capacity. In this paper, a new strategy is proposed in enabling new generation of energy dense aqueous‐based batteries, where the conversion reactions of rock salt/spinel manganese oxides and carbon nanotube‐nested nanosized Zn electrodes are exploited to extract significantly higher capacity compared to intercalation systems. Accessing the conversion reactions allows to achieve high capacities of 750 mAh g −1 (≈30 mAh cm −2 ) from manganese oxide (MnO) and 810 mAh g −1 (≈30 mAh cm −2 ) from nanoscale Zn anodes, respectively. The high areal capacities help to attain unprecedented energy densities of 210 Wh per L‐cell and 320 Wh per kg‐total (398 Wh per kg‐active) from aqueous MnO|CNT‐Zn batteries, which allows an assessment of its viable use in a small‐scale automobile.

Sponsoring Organization:
USDOE
OSTI ID:
1573846
Alternate ID(s):
OSTI ID: 1573847
Journal Information:
Advanced Energy Materials, Journal Name: Advanced Energy Materials Vol. 9 Journal Issue: 48; ISSN 1614-6832
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English
Citation Metrics:
Cited by: 51 works
Citation information provided by
Web of Science

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