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1. (WO2017033213) Additives for Fast Chargeable Lithium Ion Batteries

Pub. No.:    WO/2017/033213    International Application No.:    PCT/JP2015/004198
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Sat Aug 22 01:59:59 CEST 2015
IPC: H01M 4/133
H01M 4/587
H01M 4/62
Applicants: NEC CORPORATION
Inventors: CHENG, Qian
TAMURA, Noriyuki
Title: Additives for Fast Chargeable Lithium Ion Batteries
Abstract:
A porous graphene material with 1 to 200 graphene layers, wherein: at least one monolayer graphene is included; pores with the size of 70 nm to 200 nm are scattered over the surface of the material and the number of pores is 10 to 500 per μm2; an oxygen concentration is below 0.8 atomic%; and the ratio of the peak height (ID) of D band in a Raman scattering spectrum of the material to that of the peak height (IG) of G band at 1,570 to 1,596 cm?1 in the spectrum (ID/IG) is between 1 and 1.35. The porous graphene material is suitable for conductive additives for electrodes of Lithium ion battery.