LITHIUM ION SECONDARY BATTERY AND METHOD OF MANUFACTURING THE SAME

• Main Authors: TAKEDA KAZUHISA, OHARA KEISUKE
• Format: Patent
• Language: English; Japanese
• Published: 22.03.2018
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PROBLEM TO BE SOLVED: To provide a lithium ion secondary battery which is improved in large current charge and discharge characteristics.SOLUTION: A lithium ion secondary battery includes: a negative electrode; a positive electrode; and a nonaqueous electrolyte. The nonaqueous electrolyte contains lithium salt and aprotic solvent. The negative electrode contains composite particles. The composite particle contains a negative electrode active material and a tungsten trioxide. The negative electrode active material contains graphite. The tungsten trioxide is arranged on the surface of the negative electrode active material.SELECTED DRAWING: Figure 2 【課題】大電流充放電特性が向上したリチウムイオン二次電池を提供すること。【解決手段】リチウムイオン二次電池は、負極、正極および非水電解液を備える。非水電解液は、リチウム塩および非プロトン性溶媒を含む。負極は、複合粒子を含む。複合粒子は、負極活物質および三酸化タングステンを含む。負極活物質は、黒鉛を含有する。三酸化タングステンは、負極活物質の表面に配置されている。【選択図】図２