ELECTRODE, SECONDARY BATTERY, BATTERY PACK, AND VEHICLE

• Main Authors: SASAGAWA TETSUYA, KYUSEKI HIROSHI, KANAI YUTA
• Format: Patent
• Language: English; Japanese
• Published: 29.09.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide an electrode with excellent input/output performance, a secondary battery and a battery pack with excellent input/output performance, and a vehicle equipped with this battery pack.SOLUTION: An electrode according to an embodiment includes an active material-containing layer including an active material, inorganic solid particles having lithium ion conductivity, and a carbon material. The active material-containing layer exhibits a first peak indicating the maximum logarithmic differential pore volume in a logarithmic differential pore volume distribution curve obtained by mercury intrusion porosimetry. The pore diameter D1 of the first peak is 0.05 μm or more and 10 μm or less. The first pore volume corresponding to the first peak is 20% or more and 50% or less of the total pore volume in the active material-containing layer. The ratio of the second pore volume in the range of 0.005 μm or more and 0.02 μm or less to the first pore volume is 0.1% or more and 5% or less.SELECTED DRAWING: Figure 1 【課題】入出力性能に優れた電極、入出力性能に優れた二次電池および電池パック、並びにこの電池パックを具備する車両を提供すること。【解決手段】実施形態によれば、活物質と、リチウムイオン伝導性を有する無機固体粒子と、炭素材料とを含む活物質含有層を具備する電極が提供される。活物質含有層は、水銀圧入法による対数微分細孔容積分布曲線において、最大対数微分細孔容積を示す第１ピークを示す。第１ピークの細孔径Ｄ１は０．０５μｍ以上１０μｍ以下である。第１ピークに対応する第１細孔容積が活物質含有層における全細孔容積に対して２０％以上５０％以下である。第１細孔容積に対する０．００５μｍ以上０．０２μｍ以下の範囲の第２細孔容積の比が０．１％以上５％以下である。【選択図】 図１