TY - JOUR
T1 - A composite solid electrolyte with a framework of vertically aligned perovskite for all-solid-state Li-metal batteries
AU - Liu, Ke
AU - Wu, Maochun
AU - Wei, Lei
AU - Lin, Yanke
AU - Zhao, Tianshou
N1 - Funding Information:
The work described in this paper was fully supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. T23-601/17-R).
Funding Information:
The work described in this paper was fully supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. T23-601/17-R ).
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/9/1
Y1 - 2020/9/1
N2 - Composite solid electrolytes (CSEs), which inherit the flexibility of polymer electrolytes and the high ionic conductivity of ceramic electrolytes, hold a great potential to realize all-solid-state Li-metal batteries (ASSLMBs) with high energy density and enhanced safety. However, conventional preparation methods for CSEs by randomly dispersing ceramic particles in a polymer matrix fail to provide effective Li+ conducting networks, thus severely sacrificing the high ionic conductivity of ceramic fillers. In this work, we develop a framework of vertically aligned perovskite Li0.33La0.557TiO3 (LLTO) embedded in a PEO-LiTFSI matrix to maximize the ionic conduction. The vertically aligned LLTO structure prepared by an ice-templating method provides fast, continuous and the shortest pathways for Li+ transport, thus boosting the ionic conductivity from 0.038 to 0.13 mS cm−1. As a result, a Li|LiFePO4 full battery assembled with the developed CSE is capable of delivering a specific discharge capacity of 144.6 mAh g−1 at 1 C at 60 °C with a high capacity retention of 96.0% after 100 cycles.
AB - Composite solid electrolytes (CSEs), which inherit the flexibility of polymer electrolytes and the high ionic conductivity of ceramic electrolytes, hold a great potential to realize all-solid-state Li-metal batteries (ASSLMBs) with high energy density and enhanced safety. However, conventional preparation methods for CSEs by randomly dispersing ceramic particles in a polymer matrix fail to provide effective Li+ conducting networks, thus severely sacrificing the high ionic conductivity of ceramic fillers. In this work, we develop a framework of vertically aligned perovskite Li0.33La0.557TiO3 (LLTO) embedded in a PEO-LiTFSI matrix to maximize the ionic conduction. The vertically aligned LLTO structure prepared by an ice-templating method provides fast, continuous and the shortest pathways for Li+ transport, thus boosting the ionic conductivity from 0.038 to 0.13 mS cm−1. As a result, a Li|LiFePO4 full battery assembled with the developed CSE is capable of delivering a specific discharge capacity of 144.6 mAh g−1 at 1 C at 60 °C with a high capacity retention of 96.0% after 100 cycles.
KW - Aligned
KW - All-solid-state
KW - Lithium metal
KW - Perovskite
KW - Solid electrolyte
UR - http://www.scopus.com/inward/record.url?scp=85085517690&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2020.118265
DO - 10.1016/j.memsci.2020.118265
M3 - Journal article
AN - SCOPUS:85085517690
SN - 0376-7388
VL - 610
JO - Journal of Membrane Science
JF - Journal of Membrane Science
M1 - 118265
ER -