Gel electrolyte, preparing method thereof, gel electrolyte battery and preparing method therrof

Gel electrolyte, preparing method thereof, gel electrolyte battery and preparing method therrof

  • CN 103,098,287 A
  • Filed: 02/16/2011
  • Published: 05/08/2013
  • Est. Priority Date: 04/20/2010
  • Status: Active Application
First Claim
Patent Images

1. Claimsa kind of gel electrolyte, includes the nonaqueous solvents and gelator of lithium salts, described gelator includes following material:

  • With unsaturated double-bond polyethylene glycol compound, the esters monomer with unsaturated double-bond, silicon protective embankment coupling agent and thermal initiator;

    It is characterized in that:

    Lithium salts in the described nonaqueous solvents for including lithium salts is salt-mixture, and the salt-mixture is made up of main salt and auxiliary salt, wherein the mass percent of main salt is 70:

    100%, the mass percent of auxiliary salt is 0 30%;

    The main salt of the salt-mixture is at least one of following material:

    LiPF6

    LiBF4

    LiC104

    Lil、

    LiN03

    LiCF3S03

    LiN(CF3S02) 2

    LiN(CF2CF3S02) 2, the auxiliary salt of the salt-mixture is at least standing grain in following material:

    LiB (C204) 2Or LiBF2C204

    2. gel electrolyte as claimed in claim 1, it is characterised in that:

    The weight percent content of each composition of gel electrolyte is:

    '"'"'Polyethylene glycol compound with unsaturated double-bond:

    0. 5〜

    5%Esters monomer with unsaturated double-bond:

    0〜

    10%Silicon protective embankment coupling agent:

    0〜

    5%Thermal initiator:

    0. 01〜

    2%Include the nonaqueous solvents of lithium salts:

    80〜

    98%;

    The concentration of lithium salts is the 5M of 0. 5M 1. in the nonaqueous solvents for including lithium salts.3. gel electrolyte as claimed in claim 1, it is characterised in that:

    The described polyethylene glycol compound with unsaturated double-bond is polyethylene glycol dialkacrylates compound, is expressed from the next:

    . CH2=C (R) C00 (C CH20) n_C0C (R) =CH2, wherein, n=l 12, R represents C or C2¾



    4. the gel electrolyte as described in claim 3, it is characterised in that:

    The weight percentage of the described polyethylene glycol compound with unsaturated double-bond is:

    0. 8〜

    3. 5%.5. gel electrolyte as claimed in claim 1, it is characterised in that:

    The described esters monomer with unsaturated double-bond is selected from least one of following material:



    Alpha-Methyl)

    Alkyl acrylate, acrylic acid protective embankment ester.6. the gel electrolyte as described in claim 5, it is characterised in that:

    Described has insatiable hungerWeight percent content with the esters monomer of double bond is:

    0. 3〜

    8%.7. gel electrolyte as claimed in claim 1, it is characterised in that:

    Described silicon protective embankment coupling agent is Y-(methacryloxypropyl)

    The TMOS of propyl group three, is expressed from the next:

    CH2=C (R) -COO (CH2) n-Si- (0CH3) 3, wherein, n=l 3, R represents H or CH3

    8. gel electrolyte as claimed in claim 7, it is characterised in that:

    The weight percent content of described silane coupler is:

    0. 5〜



    3%.9. gel electrolyte as claimed in claim 1, it is characterised in that:

    Described thermal initiator is selected from least one of following material:

    Azodiisobutyronitrile, dibenzoyl peroxide, dicetyl peroxydicarbonate two(

    4- t-butyl cyclohexyl methacrylates)

    , lauroyl peroxide, di-isopropyl peroxydicarbonate.10. gel electrolyte as claimed in claim 9, it is characterised in that:

    The weight percent content of described thermal initiator is:

    0. 02〜



    1. 5%.11. gel electrolyte as claimed in claim 1, it is characterised in that:

    Nonaqueous solvents in the described nonaqueous solvents for including lithium salts is selected from least one of following material:

    Vinyl carbonate;

    Propylene carbonate;

    Butylene carbonic ester;

    1,2- dimethylvinylsiloxy carbonic ester;

    Ethyl butyl carbonate;

    Carbonic acid first butyl ester;

    Dibutyl carbonate;

    Diethyl carbonate;

    Dimethyl carbonate;

    Trifluoromethyl ethylene carbonate;

    Carbonic acid di-n-propyl ester;

    Diisopropyl carbonate;

    Methyl ethyl carbonate;

    Ethyl propyl carbonic acid ester;

    Ethylene isopropyl ester;

    Methyl propyl carbonate;

    Dimethoxy second protective embankment;

    Diethoxy second protective embankment;

    Tetrahydrofuran;

    2- methyltetrahydrofurans;

    Shrink diethylene glycol dimethyl ethers;

    Contracting TRIGLYME;

    Contracting tetraethyleneglycol dimethyl ether;

    1,3- dioxolane;

    Dimethyl sulfoxide (DMSO);

    Sulfolane;

    4- methyl isophthalic acids, 3- butyrolactone;

    Y-butyrolactone;

    Methyl formate;

    Ethyl formate;

    Methyl acetate;

    Ethyl acetate;

    Methyl propionate;

    Ethyl propionate;

    Methyl butyrate;

    Ethyl butyrate;

    Sub- vinyl carbonate;

    Third protective embankment sultone;

    Ethene sulfite.12. gel electrolyte as claimed in claim 11, it is characterised in that;

    Described lithium salts is selected from least one of following material;

    LiPF6

    LiBF4

    LiC104

    13. gel electrolyte as claimed in claim 11, it is characterised in that:

    The concentration of lithium salts is in the described nonaqueous solvents for including lithium salts:

    0. 8M〜

    L 35M. -14. gel electrolyte as claimed in claim 11, it is characterised in that:

    The weight percent content of the described nonaqueous solvents for including lithium salts is:

    88〜

    98%.15. the preparation method of the gel electrolyte as described in any claim in claim 1 14, it is characterised in that:

    Configuration includes the nonaqueous solvents of lithium salts and is divided into two parts first, is then added thereto a by the initiator and stirs, obtains lithium battery gel electrolyte component A;

    Various monomers, coupling agent are added into a in addition and stirring simultaneously to hook, lithium battery gel electrolyte component B is obtained;

    Obtained gel electrolyte is packed for two-component, and its component A and component B percentage by weight are 1;

    1.16. a kind of battery of use gel electrolyte, it is characterised in that:

    With the gel electrolyte as described in any claim in claim 1 14.17. as claimed in claim 16 using the preparation method of gel electrolyte battery, it is characterised in that:

    Configuration includes the nonaqueous solvents of lithium salts and is divided into two parts first, is then added thereto a by the initiator and stirs, obtains lithium battery gel electrolyte component A;

    Simultaneously various monomers, coupling agent are added a in addition and stirred, obtain lithium battery gel electrolyte component B;

    By gel electrolyte component A and component B by weight 1;

    1 mixing, the liquid being stirred until homogeneous, its viscosity is approached with including the nonaqueous solvents of lithium salts;

    Then by the uniform liquid being stirred injection through in dried battery, placing 16 24 hours so that gel electrolyte is fully distributed in inside battery;

    Most obtain gel electrolyte battery through in-situ thermo-polymerization afterwards.18. as claimed in claim 17 using the preparation method of gel electrolyte battery, it is characterised in that:

    Described in-situ thermo-polymerization is the one-step polymerization in lithium battery, and polymerization temperature is 50 70 °

    C, and polymerization time is 16 48 hours.19. as claimed in claim 17 using the preparation method of gel electrolyte battery, it is characterised in that:

    Described in-situ thermo-polymerization is the step-by-step polymerization in lithium battery, is that high temperature triggers, low temperature gathers wherein using two sections of temperature, initiation temperature is 60 90 °

    C, and polymerization temperature is 40 70 °

    C.20. as claimed in claim 17 using the preparation method of gel electrolyte battery, it is characterised in that:

    Described in-situ thermo-polymerization is the step-by-step polymerization in lithium battery, using two sections of temperature be high temperature trigger, low temperature polymerization, wherein, trigger the time be 45 90 minutes, polymerization time be 8 48 hours.

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