NEGATIVE ELECTRODE FOR SECONDARY CELL, SECONDARY CELL, AND NEGATIVE ELECTRODE MATERIAL FOR SECONDARY CELL
Disclosed is a negative electrode for a secondary battery, the negative electrode including: a negative electrode current collector; and a negative electrode mixture layer provided on the negative electrode current collector. The negative electrode mixture layer contains a graphite powder and a polymer electrolyte. A powder compact spring-back ratio of the graphite powder is 15 to 35%. Furthermore, disclosed is a secondary battery including: a positive electrode; the above-described negative electrode; and an electrolyte layer provided between the positive electrode and the negative electrode. Further, disclosed is a negative electrode material for a secondary battery, the negative electrode material containing a graphite powder and a polymer electrolyte.
1 . A negative electrode for a secondary battery, the negative electrode comprising:
a negative electrode current collector; and
a negative electrode mixture layer provided on the negative electrode current collector,
wherein
the negative electrode mixture layer contains a graphite powder and a polymer electrolyte, and
a powder compact spring-back ratio of the graphite powder is 15 to 35%.
2 . The negative electrode for a secondary battery according to claim 1 , wherein the powder compact spring-back ratio is 20 to 28%.
3 . A secondary battery comprising:
a positive electrode;
the negative electrode according to claim 1 ; and
an electrolyte layer provided between the positive electrode and the negative electrode.
4 . A negative electrode material for a secondary battery, the negative electrode material comprising:
a graphite powder; and
a polymer electrolyte,
wherein
a powder compact spring-back ratio of the graphite powder is 15 to 35%.
5 . The negative electrode material for a secondary battery according to claim 4 , wherein the powder compact spring-back ratio is 10 20 to 28%.
6 . The secondary battery according to claim 3 , wherein the powder compact spring-back ratio is 20 to 28%.