TY - JOUR
T1 - Composite Solid Electrolyte for Solid-State Lithium Batteries Workable at Room Temperature
AU - Sun, Yiyang
AU - Jin, Feng
AU - Li, Jing
AU - Liu, Baotong
AU - Chen, Xi
AU - Dong, Houcai
AU - Mao, Yayun
AU - Gu, Wei
AU - Xu, Jingjing
AU - Shen, Yanbin
AU - Wu, Xiaodong
AU - Chen, Liwei
N1 - Publisher Copyright:
© 2020 American Chemical Society.
PY - 2020/12/28
Y1 - 2020/12/28
N2 - Solid polymer electrolytes play a vital role in improving the safety of lithium batteries. However, low ionic conductivity and poor mechanical property limit their further applications. Herein, we fabricated a composite solid electrolyte (CSE) based on a polymer (polyvinylidene fluoride-hexafluoro propylene, PVDF-HFP) and an inorganic filler of porous graphitic carbon nitride (PGCN) nanosheets with a high specific surface area. The porous structure facilitated good distribution of PGCN in the PVDF-HFP matrix and offered abundant PVDF-HFP/PGCN interfaces, which might be beneficial for the Li+ transport. The CSE showed high ionic conductivity (2.3 × 10-4 S/cm at 30 °C), excellent cycling performance, and outstanding physical and chemical properties. Moreover, the correlation of the ionic conductivities of the CSEs and the specific surface of the PGCN fillers was discussed, and the results revealed that the ionic conductivity of the CSE was increased with the increase in the specific surface of PGCN, indirectly demonstrating that the transport of the Li+ was mainly conducted on the interfaces between the polymer and the inorganic fillers.
AB - Solid polymer electrolytes play a vital role in improving the safety of lithium batteries. However, low ionic conductivity and poor mechanical property limit their further applications. Herein, we fabricated a composite solid electrolyte (CSE) based on a polymer (polyvinylidene fluoride-hexafluoro propylene, PVDF-HFP) and an inorganic filler of porous graphitic carbon nitride (PGCN) nanosheets with a high specific surface area. The porous structure facilitated good distribution of PGCN in the PVDF-HFP matrix and offered abundant PVDF-HFP/PGCN interfaces, which might be beneficial for the Li+ transport. The CSE showed high ionic conductivity (2.3 × 10-4 S/cm at 30 °C), excellent cycling performance, and outstanding physical and chemical properties. Moreover, the correlation of the ionic conductivities of the CSEs and the specific surface of the PGCN fillers was discussed, and the results revealed that the ionic conductivity of the CSE was increased with the increase in the specific surface of PGCN, indirectly demonstrating that the transport of the Li+ was mainly conducted on the interfaces between the polymer and the inorganic fillers.
KW - Litransfer mechanism
KW - composite solid electrolyte
KW - graphitic carbon nitride
KW - ion conductivity
KW - solid-state batteries
UR - http://www.scopus.com/inward/record.url?scp=85096651187&partnerID=8YFLogxK
U2 - 10.1021/acsaem.0c02226
DO - 10.1021/acsaem.0c02226
M3 - Article
AN - SCOPUS:85096651187
SN - 2574-0962
VL - 3
SP - 12127
EP - 12133
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
IS - 12
ER -