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This content will become publicly available on April 30, 2019

Title: A manganese–hydrogen battery with potential for grid-scale energy storage

Batteries including lithium-ion, lead–acid, redox-flow and liquid-metal batteries show promise for grid-scale storage, but they are still far from meeting the grid's storage needs such as low cost, long cycle life, reliable safety and reasonable energy density for cost and footprint reduction. Here, we report a rechargeable manganese–hydrogen battery, where the cathode is cycled between soluble Mn 2+ and solid MnO 2 with a two-electron reaction, and the anode is cycled between H 2 gas and H 2O through well-known catalytic reactions of hydrogen evolution and oxidation. This battery chemistry exhibits a discharge voltage of ~1.3 V, a rate capability of 100 mA cm –2 (36 s of discharge) and a lifetime of more than 10,000 cycles without decay. We achieve a gravimetric energy density of ~139 Wh kg –1 (volumetric energy density of ~210 Wh l –1), with the theoretical gravimetric energy density of ~174 Wh kg –1 (volumetric energy density of ~263 Wh l –1) in a 4 M MnSO 4 electrolyte. In conclusion, the manganese–hydrogen battery involves low-cost abundant materials and has the potential to be scaled up for large-scale energy storage.
Authors:
 [1] ;  [2] ; ORCiD logo [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [3]
  1. Stanford Univ., Stanford, CA (United States)
  2. Stanford Univ., Stanford, CA (United States); Chinese Academy of Sciences (CAS) Key Lab of Nanosystem and Hierarchy Fabrication, Beijing (China)
  3. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Grant/Contract Number:
AC02-76SF00515
Type:
Accepted Manuscript
Journal Name:
Nature Energy
Additional Journal Information:
Journal Volume: 3; Journal Issue: 5; Journal ID: ISSN 2058-7546
Publisher:
Nature Publishing Group
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE
OSTI Identifier:
1461183