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

Journal Article · Mon Sep 01 00:00:00 EDT 2014 · Electrochemistry Communications

DOI:https://doi.org/10.1016/j.elecom.2014.06.009· OSTI ID:1228872

Chen, Zehua ^[1]; Chen, Qiyuan  ^[2]; Wang, Haiyan ^[2]; Zhang, Ruibo ^[3]; Zhou, Hui ^[3]; Chen, Liquan ^[4]; Whittingham, M. Stanley ^[3]

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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)

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.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES)
• DOE Contract Number: SC00112704
• OSTI ID: 1228872
• Report Number(s): BNL-110947-2015-JA
• Journal Information: Electrochemistry Communications, Vol. 46, Issue C; ISSN 1388-2481
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

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