公开(公告)号：US20140162134A1

公开(公告)日：2014-06-12

申请号：US14182826

申请日：2014-02-18

Applicant: Sony Corporation

Inventor： Tadashi Senoo ,  Hiroyuki Akashi ,  Hideto Azuma ,  Mashio Shibuya ,  Kazuhiro Noda ,  Shinichiro Yamada ,  Toshikazu Yasuda ,  Koji Sekai

IPC: H01M10/056

CPC classification number: H01M10/056 ,  H01G11/56 ,  H01M4/583 ,  H01M4/587 ,  H01M10/05 ,  H01M10/0525 ,  H01M10/0569 ,  H01M2300/0085 ,  Y02E60/13

Abstract: A gel electrolyte secondary cell includes a positive electrode, a negative electrode and a gel electrolyte. The negative electrode includes a current collector, and a mixture of powders of a graphite carbonaceous material and a binder. The powders of the graphite carbonaceous material include sintered meso-carbon micro-beads. The gel electrolyte includes an electrolyte salt, a non-aqueous solvent and a high-molecular weight material. The non-aqueous solvent includes propylene carbonate and ethylene carbonate. A content of propylene carbonate ranges from 35 mol % to 75 mol %. The binder is in an amount 1 to 20 wt % based on total weight of the powders of the graphite carbonaceous material. The meso-carbon micro-beads can suitably decrease the impedance and the discharge capacity loss, thereby increasing the discharging capacity and/or charging/discharging efficiency of the gel electrolyte secondary cell.

Abstract translation: 凝胶电解质二次电池包括正极，负极和凝胶电解质。 负极包括集电体和石墨碳质材料和粘合剂的粉末的混合物。 石墨碳质材料的粉末包括烧结的中碳微珠。 凝胶电解质包括电解质盐，非水溶剂和高分子量材料。 非水溶剂包括碳酸亚丙酯和碳酸亚乙酯。 丙烯碳酸酯的含量为35摩尔％〜75摩尔％。 粘合剂的量为石墨碳质材料粉末的总重量的1〜20重量％。 中和碳微珠可以适当地降低阻抗和放电容量损失，从而提高凝胶电解质二次电池的放电容量和/或充电/放电效率。

公开(公告)号：US20130280617A1

公开(公告)日：2013-10-24

申请号：US13924206

申请日：2013-06-21

Applicant: Sony Corporation

Inventor： Tadashi Senoo ,  Hiroyuki Akashi ,  Hideto Azuma ,  Mashio Shibuya ,  Kazuhiro Noda ,  Shinichiro Yamada ,  Toshikazu Yasuda ,  Koji Sekai

IPC: H01M10/056

CPC classification number: H01M10/056 ,  H01G11/56 ,  H01M4/583 ,  H01M4/587 ,  H01M10/05 ,  H01M10/0525 ,  H01M10/0569 ,  H01M2300/0085 ,  Y02E60/13

Abstract: A gel electrolyte secondary cell in which discharge capacity loss can be suppressed even with the use of a graphitized carbonaceous material of a small particle size as a negative electrode material to assure low impedance, superior cell voltage and load characteristics and high charging/discharging efficiency. To this end, a graphitized carbonaceous material prepared by firing meso-carbon micro-beads is used as a material for a negative electrode.

Abstract translation: 即使使用小粒径的石墨化碳质材料作为负极材料，也能够抑制放电容量损失的凝胶电解质二次电池，以确保低阻抗，优异的电池电压和负载特性以及高充电/放电效率。 为此，使用通过烧制内消旋碳微珠制备的石墨化碳质材料作为负极材料。