TY - JOUR
T1 - Sophisticated rGO synthesis and pre-lithiation unlocking full-cell lithium-ion battery high-rate performances
AU - Denis Louis Campéon, Benoît
AU - Yoshikawa, Yumi
AU - Teranishi, Takashi
AU - Nishina, Yuta
N1 - Funding Information:
We thank Satoshi Yasuno and the staff of SPring-8 for supporting the HAXPES experiments (Proposal Number: 2019A1778). We also thank Prof. Obata Seiji (Okayama University), Mylan Lam (Pierre and Marie Curie University), Valentin Barbe-Richaud (INP-Phelma). This research was supported by JST CREST (JPMJCR18R3).
Funding Information:
We thank Satoshi Yasuno and the staff of SPring-8 for supporting the HAXPES experiments (Proposal Number: 2019A1778). We also thank Prof. Obata Seiji (Okayama University), Mylan Lam (Pierre and Marie Curie University), Valentin Barbe-Richaud (INP-Phelma). This research was supported by JST CREST ( JPMJCR18R3 ).
PY - 2020/12/10
Y1 - 2020/12/10
N2 - For the application to portable devices and storage of renewable energies, high-performance lithium-ion batteries are in great demand. To this end, the development of high-performance electrode materials has been actively investigated. However, even if new materials exhibit high performance in a simple evaluation, namely half-cell tests, it is often impossible to obtain satisfactory performance with an actual battery (full cell). In this study, the structure of graphene analogs is modified in various ways to change crystallinity, disorder, oxygen content, electrical conductivity, and specific surface area. These graphene analogs are evaluated as negative electrodes for lithium-ion batteries, and we found reduced graphene oxide prepared by combination of chemical reduction and thermal treatment was the optimum. In addition, a full cell is fabricated by combining it with LiCoO2 modified with BaTiO3, which is applicable to high-speed charge–discharge cathode material developed in our previous research. In general, pre-lithiation is performed for the anode when assembling full cells. In this study, we optimized a "direct pre-lithiation" method in which the electrode and lithium foil were in direct contact before assembling a full cell, and created a lithium-ion battery with an output of 293 Wh kg−1 at 8,658 W kg−1.
AB - For the application to portable devices and storage of renewable energies, high-performance lithium-ion batteries are in great demand. To this end, the development of high-performance electrode materials has been actively investigated. However, even if new materials exhibit high performance in a simple evaluation, namely half-cell tests, it is often impossible to obtain satisfactory performance with an actual battery (full cell). In this study, the structure of graphene analogs is modified in various ways to change crystallinity, disorder, oxygen content, electrical conductivity, and specific surface area. These graphene analogs are evaluated as negative electrodes for lithium-ion batteries, and we found reduced graphene oxide prepared by combination of chemical reduction and thermal treatment was the optimum. In addition, a full cell is fabricated by combining it with LiCoO2 modified with BaTiO3, which is applicable to high-speed charge–discharge cathode material developed in our previous research. In general, pre-lithiation is performed for the anode when assembling full cells. In this study, we optimized a "direct pre-lithiation" method in which the electrode and lithium foil were in direct contact before assembling a full cell, and created a lithium-ion battery with an output of 293 Wh kg−1 at 8,658 W kg−1.
KW - Full-cell
KW - Graphene
KW - High-rate
KW - LiCoO
KW - Lithium-ion battery
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U2 - 10.1016/j.electacta.2020.137257
DO - 10.1016/j.electacta.2020.137257
M3 - Article
AN - SCOPUS:85092704306
VL - 363
JO - Electrochimica Acta
JF - Electrochimica Acta
SN - 0013-4686
M1 - 137257
ER -
