Open AccessSolid Polymer Electrolytes with High Conductivity and Transference Number of Li Ions for Li‐Based Rechargeable Batteries
Author(s) -
Zhao Yun,
Wang Li,
Zhou Yunan,
Liang Zheng,
Tavajohi Naser,
Li Baohua,
Li Tao
Publication year - 2021
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202003675
Subject(s) - electrolyte , conductivity , materials science , polymer electrolytes , energy storage , fast ion conductor , flexibility (engineering) , electronics , energy density , limiting , polymer , ionic conductivity , ion , nanotechnology , chemical engineering , engineering physics , electrical engineering , chemistry , composite material , electrode , mechanical engineering , physics , engineering , thermodynamics , organic chemistry , power (physics) , statistics , mathematics
Smart electronics and wearable devices require batteries with increased energy density, enhanced safety, and improved mechanical flexibility. However, current state‐of‐the‐art Li‐based rechargeable batteries (LBRBs) use highly reactive and flowable liquid electrolytes, severely limiting their ability to meet the above requirements. Therefore, solid polymer electrolytes (SPEs) are introduced to tackle the issues of liquid electrolytes. Nevertheless, due to their low Li + conductivity and Li + transference number (LITN) (around 10 −5 S cm −1 and 0.5, respectively), SPE‐based room temperature LBRBs are still in their early stages of development. This paper reviews the principles of Li + conduction inside SPEs and the corresponding strategies to improve the Li + conductivity and LITN of SPEs. Some representative applications of SPEs in high‐energy density, safe, and flexible LBRBs are then introduced and prospected.