Battelle Memorial Institute

Apple Inc.

Chongmin Wang

Wu Xu

Ji-Guang Zhang

Shuru Chen

Jiguang Zhang

Xiaolin Li

Jianming Zheng

Qiuyan Li

Ran Yi

Zihua Zhu

Pengfei Yan

Wengao Zhao

Richard M Mank

Hongli Dai

Zuqin Liu

Sujong Chae

Hyea Kim

Yaobin Xu

Rajankumar L Patel

Hyung-Seok Lim

Langli Luo

Sunho Kang

Yang He

Stabilized porous silicon particles are disclosed. The particles include a porous silicon particle comprising a plurality of interconnected silicon nanoparticles and (i) a heterogeneous layer comprising a discontinuous SiC coating that is discontinuous across a portion of pore surfaces and across a portion of an outer surface of the porous silicon particle, and a continuous carbon coating that covers outer surfaces of the discontinuous SiC coating, and remaining portions of the pore surfaces and the outer surface of the porous silicon particle, or (ii) a continuous carbon coating on surfaces of the porous silicon particle, including the outer surface and pore surfaces. Methods of making the stabilized porous silicon particles also are disclosed.

Stabilized porous silicon structure for highly stable silicon anode and methods of making

Battery cells are provided that can include: a housing defining a chamber having a fluid inlet and outlet; an anode at one side of the housing; a cathode at another side of the housing opposing and spaced apart from the anode a sufficient amount to allow for electrolyte between the anode and cathode; and the other side of the chamber defined by an ion permeable member. Methods for in situ battery electrode analysis are provided and these methods can include: providing a battery cell having an anode and a cathode; exposing the battery cell to an ion beam while the battery cell is operational to form secondary ions; and detecting the secondary ions to analyze the battery.

Battery cell and in situ battery electrode analysis method

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

High energy density cathode materials, such as LiNiMnCoO2 (NMC) cathode materials, with improved discharge capacity (hence energy density) and enhanced cycle life are described. A solid electrolyte, such as lithium phosphate infused inside of secondary particles of the cathode material demonstrates significantly enhanced structural integrity without significant or without any observable particle cracking occurring during charge/discharge processes, showing high capacity retention of more than 90% after 200 cycles at room temperature. In certain embodiments the disclosed cathode materials (and cathodes made therefrom) are formed using nickel-rich NMC and/or are used in a battery system with a non-aqueous dual-Li salt electrolytes.

High capacity and stable cathode materials

Battery cell and n situ battery electrode analysis method

Growing community of inventors

Richland, WA, United States of America

Chongmin Wang