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Macromolecular Design of Lithium Conductive Polymer as Electrolyte for Solid‐State Lithium Batteries
Author(s) -
Meng Nan,
Lian Fang,
Cui Guanglei
Publication year - 2021
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.202005762
Subject(s) - materials science , lithium (medication) , ionic conductivity , electrolyte , polymer , chemical engineering , battery (electricity) , thermal stability , lithium battery , electrochemistry , nanotechnology , ionic bonding , ion , composite material , chemistry , electrode , organic chemistry , medicine , power (physics) , physics , quantum mechanics , engineering , endocrinology
In the development of solid‐state lithium batteries, solid polymer electrolyte (SPE) has drawn extensive concerns for its thermal and chemical stability, low density, and good processability. Especially SPE efficiently suppresses the formation of lithium dendrite and promotes battery safety. However, most of SPE is derived from the matrix with simple functional group, which suffers from low ionic conductivity, reduced mechanical properties after conductivity modification, bad electrochemical stability, and low lithium‐ion transference number. Appling macromolecular design with multiple functional groups to polymer matrix is accepted as a strategy to solve the problems of SPE fundamentally. In this review, macromolecular design based on lithium conducting groups is summarized including copolymerization, network construction, and grafting. Meanwhile, the construction of single‐ion conductor polymer is also focused herein. Moreover, synergistic effects between the designed matrix, lithium salt, and fillers are reviewed with the objective to further improve the performance of SPE. At last, future studies on macromolecular design are proposed in the development of SPE for solid‐state batteries with high energy density and durability.