发明名称 |
Carboxymethylcellulose or salt thereof for electrodes of nonaqueous electrolyte secondary battery and aqueous solution thereof |
摘要 |
The present invention provides carboxymethylcellulose or a salt thereof that can prevent defects such as streaks and pinholes from occurring in the obtained electrode when it is used as a binder for an electrode of a nonaqueous electrolyte secondary battery. The present invention provides carboxymethylcellulose or a salt thereof of which ratio of a dry mass A to a dry mass B is less than 50 ppm when 2 liters of a 0.3 mass % aqueous solution of the dry mass B of the carboxymethylcellulose or a salt thereof is prepared, the entire amount of the aqueous solution is filtrated through a 250-mesh filter under a reduced pressure of −200 mmHg, and the dry mass A of a residue on the filter is measured after filtration. The applications of the carboxymethylcellulose or a salt thereof are also provided. |
申请公布号 |
US9240583(B2) |
申请公布日期 |
2016.01.19 |
申请号 |
US200913131395 |
申请日期 |
2009.11.26 |
申请人 |
NIPPON PAPER INDUSTRIES CO., LTD. |
发明人 |
Hidaka Yasuhiro;Fujiwara Kazuhiro;Inoue Kazuhiko;Satou Shinji |
分类号 |
H01M4/62;H01M4/04;H01M4/133;H01M4/1393 |
主分类号 |
H01M4/62 |
代理机构 |
Oblon, McClelland, Maier & Neustadt, L.L.P. |
代理人 |
Oblon, McClelland, Maier & Neustadt, L.L.P. |
主权项 |
1. A carboxymethylcellulose or a carboxylmethylcellulose salt, wherein:
when 2 liters of a 0.3 mass % aqueous solution of the carboxymethylcellulose or the carboxymethylcellulose salt having a dry mass B is prepared, and an entire amount of the aqueous solution is filtered through a 250-mesh filter under a reduced pressure of −200 mmHg, and a residue on the 250-mesh filter is measured to have a dry mass A after the filtration, then a ratio of the dry mass A to the dry mass B is less than 50 ppm; the carboxymethylcellulose or the carboxylmethylcellulose salt has a volume cumulative 100% particle diameter of 31 μm or more and less than 50 μm, as measured by a laser diffraction-scattering particle size distribution meter with methanol as a dispersion medium; the carboxymethylcellulose or the carboxylmethylcellulose salt satisfies all of the following (1), (2) and (3): (1) has a degree of substitution with carboxymethyl per anhydrous glucose unit of 0.45 or more, (2) has a degree of substitution with carboxymethyl per anhydrous glucose unit of 2.0 or less; (3) a 1 mass % aqueous solution of the carboxymethylcellulose or the carboxymethylcellulose salt has a viscosity of 1,000 to 20,000 m Pa·s as measured at 25° C. by a B-type viscometer; and the carboxymethylcellulose or the carboxylmethylcellulose salt is adapted to function as a binder for an electrode of a nonaqueous electrolyte secondary battery. |
地址 |
Tokyo JP |