POSITIVE ELECTRODE ACTIVE MATERIAL, POSITIVE ELECTRODE, AND SECONDARY BATTERY

• Main Authors: KAMIMURA MITSUHIRO, AWAGA KUNIO, OGAWA MITSUTERU, WU YANG, ZHANG ZHONGYUE
• Format: Patent
• Language: English; Japanese
• Published: 31.05.2018
• 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 positive electrode active material, a positive electrode, and a secondary battery, which are capable of suppressing a reduction in capacity when charge and discharge are repeated.SOLUTION: A positive electrode active material contains conductive silica and sulfur filled in a pore of the conductive silica. The conductive silica is preferably a composite containing a silica gel and particulate carbon dispersed at the inside of the silica gel. A positive electrode includes the positive electrode active material. A secondary battery includes the positive electrode.SELECTED DRAWING: Figure 1 【課題】充放電を繰り返したときにおける容量の低下を抑制できる正極活物質、正極、及び二次電池を提供すること。【解決手段】正極活物質は、導電性シリカと、前記導電性シリカの細孔内に充填された硫黄と、を含む。前記導電性シリカは、シリカゲルと、前記シリカゲルの内部において分散した微粒子状の炭素と、を含む複合体であることが好ましい。正極は、上述した正極活物質を備える。二次電池は、上述した正極を備える。【選択図】 図１