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【5th.Dec.】Recent Progresses on the Development of High Energy Li Ion and Li Metal Batteries

2017-12-04

TOPIC: Recent Progresses on the Development of High Energy Li Ion and Li Metal Batteries
SPEAKER: Prof. Ji-Guang (Jason) Zhang, Pacific Northwest National Laboratory
TIME: Dec. 5th (Tuesday) 10:00 (12月5日星期二上午10点)
LOCATION: Room 410, Chemistry Building B (化学B楼410)
INVITER: Prof. Jiulin Wang (王久林 研究员)


欢迎对能源材料和电池器件以及相关领域感兴趣老师和学生参加交流

Biography(报告人简介)

 

Dr. Ji-Guang (Jason) Zhang is a Laboratory Fellow of the Pacific Northwest National Laboratory.  He is the group leader for PNNL’s efforts in energy storage for transportation applications and has 26-year experience in the development of energy storage devices, including Li-ion batteries, Li-metal batteries, Li-air batteries, Li-S batteries, and thin-film solid-state batteries. 

 

He was the co-recipient of two R&D 100 awards, holds 22 patents (with another 18 patents pending), publishes more than 250 papers in refereed journals, and named as Highly Cited Researchers-2017 in both Materials Science and Engineering categories.

Abstract (报告摘要)
Large scale deployment of electrical vehicles needs to have an energy storage system which has an energy density far exceeding those of the state of the art Li-ion batteries. 

 

In this work, our recent progresses on cathode, anode and electrolyte used in Li-Ion batteries will be reported.  We have optimized the composition of both Ni-rich NMC and electrolyte and enabled a high discharge capacity of >220 mAh g-1 (846 Wh kg-1) and maintain a capacity retention higher than 80% after 1000 cycles.  We also developed a new approach to reduce the cycling induced cracking in Ni-rich cathode materials. 

 

On the other hand, we further improved the performance of Si based anode using a hierarchical structured micrometer-size silicon (Si)/multi-walled carbon nanotube (MWNT) composite. The unique structure of Si/MWNT composite was synthesized via a scalable self-assembly process and subsequent aluminothermic reactions.  Our recent progresses on Li-S and Li-air batteries will also be discussed.



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