Apple Inc.

Hyea Kim

Richard M Mank

Hongli Dai

Ji-Guang Zhang

Wu Xu

Zuqin Liu

Xiaolin Li

Qiuyan Li

Chongmin Wang

Ran Yi

Woo Cheol Shin

OuJung Kwon

Rajankumar L Patel

Sunho Kang

Hyung-Seok Lim

Langli Luo

Yang He

An electrochemical cell has an anode comprising a silicon-based active material, a cathode comprising a cathode active material, and an electrolyte. The electrolyte is formulated with a propionate-based solvent, a carbonate-based solvent, trifluoro toluene, a lithium salt with a molar concentration of 2.0 M or greater, and less than or equal to 5.0 wt. % of fluoroethylene carbonate.

Electrolyte for lithium-ion batteries with silicon-based anodes

An anode active material comprises a silicon-carbon secondary particle comprising a composite having an exterior conformal carbon coating and formed of type I primary particles. Each type I primary particle comprises a core particle of interconnected silicon, the interconnected silicon formed of nano-sized silicon particles each connected to at least one other particle, inner pores internal to the core particle and defined by the interconnected silicon, an internal carbon coating on internal wall surfaces of the inner pores and a conformal carbon coating on the core particle.

Interconnected silicon porous structure for anode active material

Growing community of inventors

Campbell, CA, United States of America

Hyea Kim