CN202010675263
CN111883824A
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摘要:本发明涉及聚合物材料领域,针对现有技术的放电产物易于扩散造成穿梭效应及活性物质的流失的问题,公开了一种原位聚合的固态电解质的制备方法,包括:(1)将双三氟甲磺酰基亚胺锂锂盐溶解在乙二醇二甲醚和1,3‑二氧戊环的混合液中;(2)季戊四醇四丙烯酸酯和丙烯酸‑2‑羟基乙酯溶于电解液中,再加入偶氮二异丁腈,室温下搅拌均匀;(3)将聚合物浆料与硫正极和锂负极组装成纽扣电池,加热使聚合物浆料在电池内部原位固化制得成品。显著改善了锂硫电池中的多硫化物穿梭效应,负极锂枝晶和电池的界面问题,引入含羟基聚合物结构单元,制备原位聚合型多嵌段聚合物电解质,使固态聚合物锂硫电池具有优异的电化学性能。
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Abstract: The invention relates to the field of polymer materials, and discloses a preparation method of an in-situ polymerized solid electrolyte, which aims at the problems of shuttle effect and loss of activesubstances caused by diffusion of discharge products in the prior art. The preparation method comprises the following steps: (1) dissolving lithium bis(trifluoromethanesulfonyl)imide into a mixed solution of ethylene glycol dimethyl ether and 1,3-dioxolane; (2) dissolving pentaerythritol tetraacrylate and 2-hydroxyethyl acrylate in the electrolyte, adding azodiisobutyronitrile, and uniformly stirring the electrolyte at room temperature; and (3) assembling the polymer slurry, a sulfur positive electrode and a lithium negative electrode into a button battery, and heating the button battery to cure the polymer slurry in situ in the battery to obtain a finished product. According to the present invention, the polysulfide shuttle effect in the lithium-sulfur battery is effectively reduced, theinterface problem of the negative electrode lithium dendrites and the battery is significantly improved, and the hydroxyl-containing polymer structure unit is introduced to prepare the in-situ polymerization type multi-block polymer electrolyte, such that the solid polymer lithium-sulfur battery has excellent electrochemical performance.
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申请人: 国网浙江省电力有限公司湖州供电公司 浙江泰仑电力集团有限责任公司
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Applicant: HUZHOU POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWER CO LTD; ZHEJIANG TALENT ELECTRIC GROUP CO LTD
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地址: 313000 浙江省湖州市吴兴区********(隐藏)
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发明(设计)人: 曹征领 戴建华 马爱军 陈永炜 季世超 孙峰 王志勇 尹昊云
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Inventor: CAO ZHENGLING; DAI JIANHUA; MA AIJUN; CHEN YONGWEI; JI SHICHAO; SUN FENG; WANG ZHIYONG; YIN HAOYUN
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主分类号: H01M10/0565(20100101)
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分类号: H01M10/0565(20100101) H01M10/052(20100101)
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