发明名称 |
Negative electrode for nonaqueous secondary battery, method for producing the same, and nonaqueous secondary battery |
摘要 |
Provided is a negative electrode for a nonaqueous secondary battery which achieves both suppression of reductive decomposition of an electrolyte or an electrolytic solution and suppression of an increase in resistance. Also provided are a method for producing such a negative electrode and a nonaqueous secondary battery employing such a negative electrode. A polymer coating layer is formed so as to coat at least part of surfaces of negative electrode active material particles containing silicon oxide (SiOx; 0.5≦x≦1.6). The polymer coating layer contains a cationic polymer having a positive zeta potential under neutral conditions. Since silicon oxide has a negative zeta potential, a thin uniform coating layer can be formed owing to Coulomb's force. |
申请公布号 |
US9590239(B2) |
申请公布日期 |
2017.03.07 |
申请号 |
US201414179068 |
申请日期 |
2014.02.12 |
申请人 |
KABUSHIKI KAISHA TOYOTA JIDOSHOKKI |
发明人 |
Abe Tomokuni;Oshima Hiroki;Sato Yuya;Yoshida Kisena;Goda Nobuhiro;Miyoshi Manabu |
分类号 |
H01M6/04;H01M4/36;H01M4/04;H01M4/1391;H01M4/48;H01M4/60 |
主分类号 |
H01M6/04 |
代理机构 |
Sughrue Mion, PLLC |
代理人 |
Sughrue Mion, PLLC |
主权项 |
1. A negative electrode for a nonaqueous secondary battery, including a current collector and a negative electrode active material layer bonded to the current collector,
the negative electrode active material layer including negative electrode active material particles containing silicon oxide (SiOx; 0.5≦x≦1.6), a bonding portion for bonding the negative electrode active material particles with each other and bonding the negative electrode active material particles with the current collector, and a polymer coating layer coating at least part of surfaces of at least the negative electrode active material particles, and the polymer coating layer containing a cationic polymer having a positive zeta potential under neutral conditions, wherein the polymer coating layer is formed by alternately depositing a layer of the cationic polymer and a layer of an anionic polymer having a negative zeta potential under neutral conditions, the cationic polymer layer being coated on a side of the negative electrode active material particles. |
地址 |
Kariya-shi JP |