Polyelectrolyte material applicable to lithium battery and preparation method of polyelectrolyte material
A technology of polyelectrolyte and lithium battery, applied in lithium battery, non-aqueous electrolyte battery, secondary battery, etc., to avoid chemical degradation, improve charge and discharge performance, and reduce polarization
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Embodiment 1
[0078] This embodiment provides a polyelectrolyte material for lithium battery applications.
[0079] A polyelectrolyte material for lithium battery applications provided in this embodiment includes:
[0080] A polyvinylidene fluoride structural unit (A) composed of x molar parts of vinylidene fluoride monomer, a chlorotrifluoroethylene structural unit (B) composed of y molar parts of chlorotrifluoroethylene monomer, and z molar parts of perfluorovinyl ether sulfonate A polyelectrolyte material composed of three compound structural units of perfluorovinyl ether sulfonate lithium structural unit (C) composed of lithium acid monomer; and
[0081] The polyelectrolyte material has the following general structural formula:
[0082]
[0083] in:
[0084] In the perfluorovinyl ether sulfonate lithium structural unit, it:
[0085] m is an integer from 0 to 10, and n is an integer from 0 to 6;
[0086] The respective mole fractions of the polyvinylidene fluoride structural unit,...
Embodiment 2
[0099] This embodiment provides a method for preparing a polyelectrolyte material for lithium battery applications.
[0100] A method for preparing a polyelectrolyte material for lithium battery applications provided in this embodiment includes the following steps:
[0101] In the reaction device, vinylidene fluoride monomer, chlorotrifluoroethylene monomer and Lithium perfluorovinyl ether sulfonate monomer and initiator are copolymerized by a polymerization reaction method to prepare the polyelectrolyte material for lithium battery applications, and the reaction formula is:
[0102]
[0103] Further, in the above preparation method:
[0104] The reaction device is an autoclave;
[0105] The steps of adding vinylidene fluoride monomer, chlorotrifluoroethylene monomer, perfluorovinyl ether sulfonate lithium monomer and initiator respectively include:
[0106] In the high-pressure reactor, first add chlorotrifluoroethylene monomer, perfluorovinyl ether sulfonate lithium mo...
example 1
[0134] In a high-pressure reactor with a tolerance of 10MPa, add the structural formula CF 2 = the chlorotrifluoroethylene monomer of CFCl, and the structural formula is Lithium perfluorovinyl ether sulfonate monomer and benzoyl peroxide initiator, repeatedly evacuated to remove oxygen, and then filled with structural formula CH under nitrogen atmosphere 2 = CF 2 Vinylidene fluoride gas;
[0135] in:
[0136] The structural formula is CH 2 = CF 2 The polyvinylidene fluoride structural unit composed of vinylidene fluoride gas, the structural formula is CF 2 The chlorotrifluoroethylene structural unit that the chlorotrifluoroethylene monomer of =CFCl is formed, and be F by structural formula 2 C=CF-OCF 2 (CF 3 ) CF-SO 3 Li + The mole fraction ratio of the three perfluorovinyl ether sulfonate lithium structural units formed by the perfluorovinyl ether sulfonate lithium monomer is:
[0137] Vinylidene fluoride structural unit: chlorotrifluoroethylene structural unit: p...
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