首页|In Situ Directional Polymerization of Poly(1,3-dioxolane)Solid Electrolyte Induced by Cellulose Paper-Based Composite Separator for Lithium Metal Batteries

In Situ Directional Polymerization of Poly(1,3-dioxolane)Solid Electrolyte Induced by Cellulose Paper-Based Composite Separator for Lithium Metal Batteries

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In traditional in situ polymerization preparation for solid-state electrolytes,initiators are directly added to the liquid precursor.In this article,a novel cellulose paper-based composite separator is fabricated,which employs alumina as the inorganic reinforcing material and is loaded with polymerization initiator aluminum trifluoromethanesulfonate.Based upon this,a separator-induced in situ directional polymerization technique is demonstrated,and the extra addition of initiators into liquid precursors is no longer required.The polymerization starts from the surface and interior of the separator and extends outward with the gradually dissolving of initiators into the precursor.Compared with its traditional counterpart,the separator-induced poly(1,3-dioxolane)electrolyte shows improved interfacial contact as well as appropriately mitigated polymerization rate,which are conducive to practical applications.Electrochemical measurement results show that the prepared poly(1,3-dioxolane)solid electrolyte possesses an oxidation potential up to 4.4 V and a high Li+transference number of 0.72.After 1000 cycles at 2 C rate(340 mA g-1),the assembled LillLiFePO4 solid battery possesses a 106.8 mAh g-1 discharge capacity retention and 83.5％capacity retention ratio,with high average Coulombic efficiency of 99.5％achieved.Our work may provide new ideas for the design and application of in situ polymerization technique for solid electrolytes and solid batteries.

cellulose paper-based composite separatorin situ directional polymerizationlithium metal batterypoly-DOL electrolytesolid-state electrolyte

Jian Ma、Yueyue Wu、Hao Jiang、Xin Yao、Fan Zhang、Xianglong Hou、Xuyong Feng、Hongfa Xiang

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School of Materials Science and Engineering,Anhui Provincial Key Laboratory of Advanced Functional Materials and Devices,Hefei University of Technology,Hefei 230009,China

国家自然科学基金国家自然科学基金安徽省重点研发计划安徽省自然科学基金Science and Technology Major Project of Anhui Province中央高校基本科研业务费专项中央高校基本科研业务费专项

5207210521676067202104a050200442108085J23202003a05020014PA2021KCPY0028JZ2020YYPY0109

2023

10.1002/eem2.12370

能源与环境材料(英文)

能源与环境材料(英文)

CSCD
ISSN：
年,卷(期)：2023.6(3)
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