STABILIZED LITHIUM POWDER AND LITHIUM ION SECONDARY BATTERY USING THE SAME

• Main Authors: AKIMOTO KAZUMA, YAMAMOTO YUJI, TSUCHIYA MASAHIRO
• Format: Patent
• Language: English; Japanese
• Published: 10.11.2016
• Subjects: BASIC ELECTRIC ELEMENTS; CASTING; ELECTRICITY; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; PERFORMING OPERATIONS; POWDER METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; TRANSPORTING; WORKING METALLIC POWDER

PROBLEM TO BE SOLVED: To provide a stabilized lithium powder allowing lithium to be uniformly doped, and a lithium ion secondary battery using the lithium powder to improve cycle characteristics.SOLUTION: A stabilized lithium powder has a coating film on the surface of lithium particles and has a repose angle of 35 degrees or less. In a step of applying the stabilized powder, dispersed in a dehydrated solvent, onto an anode 20 and drying the stabilized powder, the stabilized lithium powder is allowed to uniformly exist on the anode 20, whereby lithium can be uniformly doped on the anode 20 to improve cycle characteristics.SELECTED DRAWING: Figure 1 【課題】リチウムを均一にドープすることができる安定化リチウム粉及びそれを用いてサイクル特性を向上させたリチウムイオン二次電池の提供。【解決手段】リチウム粒子の表面に被膜を有する安定化リチウム粉であって、安息角が３５度以下であり、脱水した溶剤中に分散させた安定化リチウム粉を負極２０上に塗布し、乾燥させる工程において、負極２０上に安定化リチウム粉を均一に存在させることが可能となり、負極２０にリチウムを均一にドープすることができ、サイクル特性が改善される安定化リチウム粉。【選択図】図１