Exergy Power Systems, Inc.

Attaccato Limiied Liability Company

Taichi Sakamoto

Yuta Ikeuchi

Takashi Mukai

Naoto Yamashita

Kazuma Yoshida

Kaduo Tsutsumi

Daichi Iwanari

Kazuyoshi Tanaka

To provide a negative electrode of a lithium ion battery excellent in cycle life characteristics. The negative electrode for a lithium ion battery includes an Si-based material as an active material, wherein a skeleton-forming agent including a silicate having a siloxane bond or a phosphate having an aluminophosphate bond as an ingredient is present on the surface and inside of an active material layer, and the skeleton of the active material is formed with the skeleton-forming agent.

Skeleton-forming agent and negative electrode using same

A conventional bipolar battery is constituted of a combination of cells hermetically sealed for preventing a liquid junction and preventing corrosion of a peripheral device due to a liquid leakage. Therefore, electrolytic solution injecting processes are carried out as many as the number of cells, so that much times and costs have been required for manufacturing a large-scale battery. In addition, a wiring space has been required since the cells are connected to one another with wires. The use of a current collector formed of a one-end closed tubular conductor, the current collector having a bottom protruding outward to form a protrusion, eliminates the wiring space and achieves a reduction in ohmic loss due to the wires. In addition, an electrolytic solution in one cell is separated by a water-repellent sheet from an electrolytic solution in another cell, so that a liquid junction is prevented.

Bipolar battery

Growing community of inventors

Izumi, Japan

Taichi Sakamoto