LITHIUM SULFUR BATTERY COMPOSITE POSITIVE ELECTRODE MATERIAL AND PREPARATION METHOD THEREOF

WIPO Patent Application WO/2016/192389

A1

The present invention relates to a lithium sulfur battery composite positive electrode material and a preparation method thereof. The lithium sulfur battery composite positive electrode material is prepared by using a conductive agent having a mesoporous structure, sulfur, and a modifying agent. The sulfur is dispersed in holes of the conductive agent, the modifying agent is connected to orifices of the conductive agent by using a chemical bonding manner, and the mass ratios of the components are: 30% to 59.4% of the conductive agent, 40% to 60% of the sulfur, and 0.1% to 10% of the modifying agent. The preparation method thereof comprises: pouring sulfur into a conductive agent by adopting a molten suction method, to obtain a conductive agent/sulfur composite material; and then modifying the obtained conductive agent/sulfur composite material, to obtain a lithium sulfur battery composite positive electrode material. The composite positive electrode material not only can implement excellent high-rate stability performance, but also can effectively reduce the loss of active substances and the influence such as lithium negative electrode corrosion and rapid capacity attenuation caused by a "shuttle effect" due to dissolution of lithium polysulfide, thereby remarkably increasing the cycle performance of a lithium sulfur battery.

JP6882133	Formation of sulfur particles with organic acids in the presence of polymer functionalized carbon
WO/2022/159672	NANOCOMPOSITE AND METHOD OF MAKING CATALYST FOR HIGH LOADING AND UTILIZATION OF SULFUR AT ELEVATED TEMPERATURES
WO/2016/136543	POLYIMIDE-COATED ACTIVE MATERIAL PARTICLES, SLURRY FOR ELECTRODE MATERIAL, NEGATIVE ELECTRODE, BATTERY, AND METHOD FOR PRODUCING POLYIMIDE-COATED ACTIVE MATERIAL PARTICLES

ZHOU CHENGGANG (CN)
ZHOU YIN (CN)
YAN YUNPAN (CN)
HAN BO (CN)
WU JINPING (CN)

PCT/CN2015/099570

December 08, 2016

December 29, 2015

Click for automatic bibliography generation  

UNIV CHINA GEOSCIENCES WUHAN (CN)

H01M4/62

CN104900880A	2015-09-09
CN103515614A	2014-01-15
CN102324507A	2012-01-18
CN103500847A	2014-01-08

XU & PARTNERS, LLC. (CN)
上海一平知识产权代理有限公司 (CN)

View/Download PDF      PDF Help

Previous Patent: METHOD FOR FINISHING FABRIC BY ADOPTING MOSQUITO REPELLING MICROCAPSULES

Next Patent: SUBSEA HEAT FLOW LONG-TERM OBSERVATION PROBE BASED ON UNDERWATER ROBOT PLATFORM