| CPC H01M 4/623 (2013.01) [H01M 4/366 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01)] | 21 Claims |
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1. An alkali metal ion secondary battery which has a positive electrode, a negative electrode, a separator and an electrolytic solution in an exterior case, wherein one or both of the positive electrode and the negative electrode have a coating layer formed from a composition comprising a perfluoropolyether group-containing compound which is a combination of a compound (A1) and a compound (A2), a combination of a compound (B1) and a compound (B2), a combination of a compound (C1) and a compound (C2), a combination of a compound (D1) and a compound (D2), or a combination of a compound (E1) and a compound (E2):
 wherein:
Rf each independently represents an alkyl group having 1 to 16 carbon atoms optionally substituted with one or more fluorine atoms;
PFPE each independently represents —(OC6F12)a—(OC5F10)b—(OC4F8)c—(OC3F6)d—(OC2F4)e—(OCF2)f—, wherein a, b, c, d, e and f are each independently an integer of 0 or more and 200 or less, and the sum of a, b, c, d, e and f is at least 1, the occurrence order of the respective repeating units in parentheses with subscript a, b, c, d, e or f is not limited in the formula;
R1 each independently at each occurrence represents a hydrogen atom or an alkyl group having 1 to 22 carbon atoms;
R2 each independently at each occurrence represents a hydroxyl group or a hydrolyzable group;
R11 each independently at each occurrence represents a hydrogen atom or a halogen atom;
R12 each independently at each occurrence represents a hydrogen atom or a lower alkyl group;
n is an integer of 0 to 3 independently for each (—SiR1nR23-n) unit;
provided that, in formulae (A1), (A2), (B1) and (B2), at least one R2 is present;
X1 each independently represents a single bond or a di- to pentavalent organic group;
X2 each independently at each occurrence represents a single bond or a divalent organic group;
t each independently at each occurrence represents an integer of 1 to 10;
α is each independently an integer of 1 to 9;
α is an integer of 1 to 9;
X5 each independently represents a di- to pentavalent organic group;
β is each independently an integer of 1 to 9;
β′ is an integer of 1 to 9;
X7 each independently represents a single bond or a di- to pentavalent organic group;
γ is each independently an integer of 1 to 9;
γ′ is an integer of 1 to 9;
Ra each independently at each occurrence represents —Z—SiR71pR72qR73r;
Z each independently at each occurrence represents an oxygen atom or a divalent organic group;
R71 each independently at each occurrence represents Ra′;
Ra′ has the same definition as Ra;
in Ra, the number of Si linearly connected via Z group is at most 5;
R72 each independently at each occurrence represents a hydroxyl group or a hydrolyzable group;
R73 each independently at each occurrence represents a hydrogen atom or a lower alkyl group;
p is each independently at each occurrence an integer of 0 to 3;
q is each independently at each occurrence an integer of 0 to 3;
r is each independently at each occurrence an integer of 0 to 3;
provided that, the sum of p, q and r is 3 for each —Z—SiR71pR72qR73r, and at least one R72 is present in formulae (C1) and (C2);
Rb each independently at each occurrence represents a hydroxyl group or a hydrolyzable group;
RC each independently at each occurrence represents a hydrogen atom or a lower alkyl group;
k is each independently at each occurrence an integer of 1 to 3;
1 is each independently at each occurrence an integer of 0 to 2;
m is each independently at each occurrence an integer of 0 to 2;
provided that, in the unit in parentheses with the subscript γ, the sum of k, l and m is 3;
X9 each independently represents a single bond or a di- to pentavalent organic group;
δ is each independently an integer of 1 to 9;
δ′ is an integer of 1 to 9;
Rd each independently at each occurrence represents —Z′—CR81p′R82q′R83r′;
Z′ each independently at each occurrence represents an oxygen atom or a divalent organic group;
R81 each independently at each occurrence represents Rd′;
Rd′ has the same meaning as Rd;
in Rd, the number of C linearly connected via Z′ group is at most 5;
R82 each independently at each occurrence represents —Y—SiR85jR863-j;
Y each independently at each occurrence represents a divalent organic group;
R85 each independently at each occurrence represents a hydroxyl group or a hydrolyzable group;
R86 each independently at each occurrence represents a hydrogen atom or a lower alkyl group;
j represents an integer of 1 to 3 independently for each (—Y—SiR85jR863-j) unit;
R83 each independently at each occurrence represents a hydrogen atom or a lower alkyl group;
p′ is each independently at each occurrence an integer of 0 to 3;
q′ is each independently at each occurrence an integer of 0 to 3;
r′ is each independently at each occurrence an integer of 0 to 3;
Re each independently at each occurrence represents —Y—SiR85jR863-j;
Rf each independently at each occurrence represents a hydrogen atom or a lower alkyl group;
k′ is each independently at each occurrence an integer of 0 to 3;
l′ is each independently at each occurrence an integer of 0 to 3;
m′ is each independently at each occurrence an integer of 0 to 3;
provided that, in the formula, at least one q′ is 2 or 3 or at least one l′ is 2 or 3;
X3 each independently represents a single bond or a di- to pentavalent organic group;
ε is each independently an integer of 1 to 9;
ε′ is an integer of 1 to 9;
A each independently at each occurrence represents —OH, —SH, —NR2, —COOR or —SO3R; and
R represents a hydrogen atom or an alkyl group.
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