Journal
JOURNAL OF POWER SOURCES
Volume 283, Issue -, Pages 68-73Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2015.01.193
Keywords
Lithium ion capacitor; Graphite lithiation; In situ synchrotron wide-angle X-ray scattering
Funding
- Fundamental R&D Program for Core Technology of Materials and Industrial Strategic Technology Development Program - Ministry of Trade, Industry and Energy, Republic of Korea
- Korea Institute of Science and Technology (KIST) [2E25371]
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Lithium pre-doping of graphite anode is a key process to achieve high energy density lithium-ion capacitor. In this study, in situ synchrotron wide-angle X-ray scattering examinations directly revealed that the direct contact (DC) method, simply achieved through direct physical contact between graphite electrode and sacrificial lithium metal in electrolyte, provides much faster phase transformation from stage 1' to stage 1 than conventional electronic charger (EC) and external short circuit (ESC) methods at the same doping time level. The observations indicate that DC method achieves faster pre-lithiation rate of graphite electrode than EC and ESC processes. (C) 2015 Elsevier B.V. All rights reserved.
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