Lithium battery and manufacturing method thereof
A manufacturing method and technology for lithium batteries, applied in electrode manufacturing, secondary batteries, battery electrodes, etc., can solve the problems of battery explosion, inability to effectively suppress deoxidation, and no thermal actuation safety mechanism, etc., to improve safety, The effect of reducing the risk of thermal runaway occurring
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[0038] Specific examples include: vinylimide (N-Vinylimide), N-vinylphthalimide (N-Vinylphthalimide), vinylacetamide (vinylacetamide) and the like.
[0039] (A4) The maleimides mentioned above include monomaleimide, bismaleimide, trimaleimide and polymaleimide, among which the bismaleimide single The body has the structure shown in formula (I) or formula (II):
[0040]
[0041] Formula (I) Formula (II)
[0042] Where R 1 For-RCH 2 R-, -RNH 2 R-, -C(O)CH 2 -, -CH 2 OCH 2 -, -C(O)-, -O-, -O-O-, -S-, -S-S-, -S(O)-, -CH 2 S(O)CH 2 -, -(O)S(O)-, phenylene (-C 6 H 4 -), biphenylene group, substituted phenylene group (such as -CH 2 (C 6 H 4 )CH 2 -, -CH 2 (C 6 H 4 )(O)-) or substituted biphenylene group, and R 2 For-RCH 2 -, -C(O)-, -C(CH 3 ) 2 -, -O-, -O-O-, -S-, -S-S-, -(O)S(O)-, or -S(O)-, where R is an alkyl group of 1-6 carbons. Specific examples of bismaleimides include: N,N'-bismaleimide-4,4'-diphenylmethane (N,N'-bismaleimide-4,4'-diphenylmethane), 1 , 1'-(methylenedi-4,1-phenylen...
Example
[0072] [Synthesis examples 1-9 of nitrogen-containing polymer]
[0073] (1) Put 2.55 g (0.071M) N,N'-4,4'-diphenylmethane-bismaleimide and 0.45 g (0.035M) barbituric acid in a 500ml four-necked reactor After adding 97 g of N-methylpyrrolidone (NMP) and stirring to dissolve it; then reacting at 130°C for 48 hours to obtain a nitrogen-containing polymer with a solid content of 3.0%, which is a double Maleimide oligomers have a degree of divergence of about 75%; DSC analysis (heating rate: 10°C / min@N2) shows that the thermal crosslinking temperature is about 80°C to 90°C.
[0074] (2) Put 2.55 g (0.071M) N,N'-4,4'-diphenylmethane-bismaleimide and 0.45 g (0.035M) barbituric acid in a 500ml four-necked reactor After adding 97 grams of γ-butyl lactone (GBL) and stirring to dissolve it; then reacting at 130°C for 48 hours to obtain a nitrogen-containing polymer with a solid content of 3.0%, with a degree of divergence of about 65%; DSC Analysis (heating rate: 10℃ / min@N2), the thermal cr...
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