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Title: Hyper-dendritic nanoporous zinc foam anodes

The low cost, significant reducing potential, and relative safety of the zinc electrode is a common hope for a reductant in secondary batteries, but it is limited mainly to primary implementation due to shape change. In this work we exploit such shape change for the benefit of static electrodes through the electrodeposition of hyper-dendritic nanoporous zinc foam. Electrodeposition of zinc foam resulted in nanoparticles formed on secondary dendrites in a three-dimensional network with a particle size distribution of 54.1 - 96.0 nm. The nanoporous zinc foam contributed to highly oriented crystals, high surface area and more rapid kinetics in contrast to conventional zinc in alkaline mediums. The anode material presented had a utilization of ~ 88% at full depth-of-discharge at various rates indicating a superb rate-capability. The rechargeability of Zn⁰/Zn²⁺ showed significant capacity retention over 100 cycles at a 40% depth-of-discharge to ensure that the dendritic core structure was imperforated. The dendritic architecture was densified upon charge-discharge cycling and presented superior performance compared to bulk zinc electrodes.
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [2] ;  [3] ;  [1] ;  [2]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Princeton Univ., NJ (United States)
  3. City College of New York, NY (United States)
Publication Date:
OSTI Identifier:
1183287
Report Number(s):
BNL--107765-2015-JA
Journal ID: ISSN 1884-4057; YN0100000
Grant/Contract Number:
SC00112704
Type:
Accepted Manuscript
Journal Name:
NPG Asia Materials (Online)
Additional Journal Information:
Journal Name: NPG Asia Materials (Online); Journal Volume: 7; Journal Issue: 4; Conference: 2015 MRS Spring Meeting, San Francisco, CA (United States), 6-10 Apri 2015; Journal ID: ISSN 1884-4057
Publisher:
Nature Publishing Group Asia
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE zinc; hyper-dendritic; nanoporous; anode