NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERIES, LITHIUM ION SECONDARY BATTERY, AND MANUFACTURING METHODS THEREOF

• Main Authors: HARUNA HIROSHI, ABE TOSHIO
• Format: Patent
• Language: English; Japanese
• Published: 16.11.2015
• 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 negative electrode for lithium ion secondary batteries, which is to be used for a lithium ion secondary battery superior in initial charge and discharge efficiencies.SOLUTION: A lithium ion secondary battery comprises: a negative electrode for lithium secondary batteries or lithium ion secondary batteries; and an electrolytic solution for lithium ion secondary batteries. The negative electrode comprises a cyclic boroxine compound expressed by (RO)(RO)(RO)(BO)(where R, Rand Reach represent a carbon hydride group). For instance, the mixed amount of the cyclic boroxine is 10% or less; at least one of R, Rand Ris secondary carbon; and the cyclic boroxine compound is triisopropoxyboroxine. The electrolytic solution for lithium secondary batteries includes vinylene carbonate. 【課題】初回の充放電効率に優れたリチウムイオン二次電池に用いられるリチウムイオン二次電池用負極を提供する。【解決手段】（Ｒ1Ｏ）（Ｒ2Ｏ）（Ｒ3Ｏ）（ＢＯ）3（Ｒ1、Ｒ2、Ｒ3は炭化水素基）で示される環状ボロキシン化合物を含むリチウムイオン二次電池用負極であり、例えば、環状ボロキシンの混合量が１０％以下であり、Ｒ1、Ｒ2、Ｒ3のいずれか一つ以上が２級炭素であり、環状ボロキシン化合物はトリイソプロポキシボロキシンであるリチウム二次電池または、リチウムイオン二次電池用負極を有するリチウムイオン二次電池であって、リチウムイオン二次電池は、リチウムイオン二次電池用電解液を含み、リチウム二次電池用電解液は、ビニレンカーボネートを含むリチウムイオン二次電池。【選択図】 図１