TY - JOUR
T1 - Suppressed Mobility of Negative Charges in Polymer Electrolytes with an Ether-Functionalized Anion
AU - Zhang, Heng
AU - Chen, Fangfang
AU - Lakuntza, Oier
AU - Oteo, Uxue
AU - Qiao, Lixin
AU - Martinez-Ibañez, Maria
AU - Zhu, Haijin
AU - Carrasco, Javier
AU - Forsyth, Maria
AU - Armand, Michel
N1 - Publisher Copyright:
© 2019 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.
PY - 2019/8/26
Y1 - 2019/8/26
N2 - Suppressing the mobility of anionic species in polymer electrolytes (PEs) is essential for mitigating the concentration gradient and internal cell polarization, and thereby improving the stability and cycle life of rechargeable alkali metal batteries. Now, an ether-functionalized anion (EFA) is used as a counter-charge in a lithium salt. As the salt component in PEs, it achieves low anionic diffusivity but sufficient Li-ion conductivity. The ethylene oxide unit in EFA endows nanosized self-agglomeration of anions and trapping interactions between the anions and its structurally homologous matrix, poly(ethylene oxide), thus suppressing the mobility of negative charges. In contrast to previous strategies of using anion traps or tethering anions to a polymer/inorganic backbone, this work offers a facile and elegant methodology on accessing selective and efficient Li-ion transport in PEs and related electrolyte materials (for example, composites and hybrid electrolytes).
AB - Suppressing the mobility of anionic species in polymer electrolytes (PEs) is essential for mitigating the concentration gradient and internal cell polarization, and thereby improving the stability and cycle life of rechargeable alkali metal batteries. Now, an ether-functionalized anion (EFA) is used as a counter-charge in a lithium salt. As the salt component in PEs, it achieves low anionic diffusivity but sufficient Li-ion conductivity. The ethylene oxide unit in EFA endows nanosized self-agglomeration of anions and trapping interactions between the anions and its structurally homologous matrix, poly(ethylene oxide), thus suppressing the mobility of negative charges. In contrast to previous strategies of using anion traps or tethering anions to a polymer/inorganic backbone, this work offers a facile and elegant methodology on accessing selective and efficient Li-ion transport in PEs and related electrolyte materials (for example, composites and hybrid electrolytes).
KW - batteries
KW - electrolytes
KW - ether-functionalized anions
KW - negative charge mobility
UR - http://www.scopus.com/inward/record.url?scp=85070277750&partnerID=8YFLogxK
U2 - 10.1002/anie.201905794
DO - 10.1002/anie.201905794
M3 - 文章
C2 - 31259482
AN - SCOPUS:85070277750
SN - 1433-7851
VL - 58
SP - 12070
EP - 12075
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 35
ER -