Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 46, Pages 43056-43065Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b11259
Keywords
poly(vinylene carbonate); composite polymer electrolyte; in situ solidification; interfacial stability; high ionic conductivity; solid-state sodium batteries
Funding
- Natural Science Foundation of China [21676165, 21938005, 21506123]
- National Key Research and Development Program [2016YFB0901500]
Ask authors/readers for more resources
Solid-state rechargeable batteries using polymer electrolytes have been considered, which can avoid safety issues and enhance energy density. However, commercial application of the polymer electrolyte solid-state battery is still significantly limited by the low room-temperature ionic conductivity, poor mechanical properties, and weak interfacial compatibility between the electrolyte and electrode, especially for the room-temperature solid-state rechargeable battery. In this work, a poly(vinylene carbonate)-based composite polymer electrolyte (PVC-CPE) is reported for the first time to realize room-temperature solid-state sodium batteries with high performances. This in situ solidified PVC-CPE possesses superior ionic conductivity (0.12 mS cm(-1) at 25 degrees C), high Na+ transference number (t(Na)(+) = 0.60), as well as enhanced electrode/electrolyte interfacial stability. Notably, the composite cathode NaNi1/3Fe1/3Mn1/3O2 (c-NFM) is designed through the in situ growth of the polymer electrolyte inside the electrode to decrease interfacial resistance and facilitate effective ion transport in electrode/electrolyte interfaces. It is demonstrated that the solid-state c-NFM/PVC-CPE/Na battery assembled by a one-step in situ solidification method exhibits remarkably enhanced cell performances at room temperature compared with a reference NFM/PVC-CPE/Na assembled through a conventional ex situ method. The battery presents a high initial specific capacity of 104.2 mA h g(-1) at 0.2 C with a capacity retention of 86.8% over 250 cycles and similar to 80.2 mA h g(-1) at 1 C. This study suggests that PVC-CPE is a very promising electrolyte for solid-state sodium batteries. This study also suggests a new method to design high-performance polymer electrolytes for other solid-state rechargeable batteries to realize high safety and considerable electrochemical performance at room temperature.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available