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Title: A β-VOPO4/ε-VOPO4 composite Li-ion battery cathode

VOPO4 is an example of a Li-ion battery cathode that can achieve over 300 Ah/kg when two Li-ions are intercalated. A two phase β-VOPO4/ε-VOPO4 composite was found to improve the cycling capacity of ε-VOPO4 from tetragonal H2VOPO4, particularly as the rate is increased. In the potential range of 2.0–4.5 V, this composite showed an initial electrochemical capacity of 208 mAh/g at 0.08 mA/cm2, 190 mAh/g at 0.16 mA/cm2, and 160 mAh/g at 0.41 mA/cm2.
Authors:
 [1] ;  [2] ;  [2] ;  [3] ;  [3] ;  [4] ;  [3]
  1. Central South Univ., Changsha (China); State Univ. of New York (SUNY), Binghamton, NY (United States)
  2. Central South Univ., Changsha (China)
  3. State Univ. of New York (SUNY), Binghamton, NY (United States)
  4. Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics. Beijing National Lab. for Condensed Matter Physics (BNLCP-CAS)
Publication Date:
OSTI Identifier:
1228872
Report Number(s):
BNL--110947-2015-JA
Journal ID: ISSN 1388-2481
DOE Contract Number:
SC00112704
Resource Type:
Journal Article
Resource Relation:
Journal Name: Electrochemistry Communications; Journal Volume: 46; Journal Issue: C
Publisher:
Elsevier
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE