TY - JOUR
T1 - In situ synchrotron wide-angle X-ray scattering study on rapid lithiation of graphite anode via direct contact method for Li-ion capacitors
AU - Park, Hyunchul
AU - Kim, Minho
AU - Xu, Fan
AU - Jung, Cheolsoo
AU - Hong, Soon Man
AU - Koo, Chong Min
N1 - Funding Information:
This work was supported by Fundamental R&D Program for Core Technology of Materials and Industrial Strategic Technology Development Program funded by the Ministry of Trade, Industry and Energy, Republic of Korea and and partially by the Korea Institute of Science and Technology (KIST Program No. 2E25371 ). Synchrotron WAXS measurements were performed at the Pohang Light Source.
PY - 2015/6/1
Y1 - 2015/6/1
N2 - 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.
AB - 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.
KW - Graphite lithiation
KW - In situ synchrotron wide-angle
KW - Lithium ion capacitor
KW - X-ray scattering
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U2 - 10.1016/j.jpowsour.2015.01.193
DO - 10.1016/j.jpowsour.2015.01.193
M3 - Article
AN - SCOPUS:84923812083
VL - 283
SP - 68
EP - 73
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
ER -