백운규
2019-12-02T04:23:58Z
2019-12-02T04:23:58Z
2017-11
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, v. 56, no. 46, page. 13776-13782
0888-5885
https://pubs.acs.org/doi/10.1021/acs.iecr.7b03797
https://repository.hanyang.ac.kr/handle/20.500.11754/116253
The high energy density graphite anode for the commercial LIBs has critical problems on Lition kinetics due to decreases both in electrode porosity and electrolyte permeability. To overcome issues, interfaces of graphite particles in the anode are polarized using poly(vinylidene fluoride)-hexafluoropropylene (PVDF-HFP) with the high dielectric constant (epsilon = 8.4), high solubility with lithium salt, and ability to trap a large amount of liquid electrolyte. The PVDF-HFP treatment promoted electrolyte permeability into the graphite electrode with a high mass loading of 13.8 mg cm(-2) and a density of 1.7 g cc(-1) (a current density over 5 mA cm-2) which particularly leads to an improvement of capacity retention from 77% of a bare electrode to 95% over 40 cycles. These achievements were of the lithium-ion kinetics but also to the stable formation of a solid electrolyte into ere attributed not only to the enhancement erface (SEI) layer on the graphite surface.
This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) through the Energy Efficiency & Resources Core Technology Program (No. 20142020104190) and the Ministry of Trade, Industry, & Energy (MOTIE) of the Republic of Korea through the international reseach on Li-ion batteries (No. 20168510050080).
en_US
AMER CHEMICAL SOC
RECHARGEABLE LITHIUM BATTERIES
LAYERED OXIDE CATHODES
POLYMER ELECTROLYTES
HIGH-CAPACITY
PERFORMANCE
SURFACE
CHALLENGES
ELECTRODES
POWER
Dielectric Polarization of a High-Energy Density Graphite Anode and Its Physicochemical Effect on Li-Ion Batteries
Article
46
56
10.1021/acs.iecr.7b03797
13776-13782
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Park, Hyunjung
Shin, Donghyeok
Paik, Ungyu
Song, Taeseup
2017003543
S
COLLEGE OF ENGINEERING[S]
DEPARTMENT OF ENERGY ENGINEERING
upaik