Improving the Conductivity of Solid Polymer Electrolyte by Grain Reforming

Wei，Zhaohuan1,2; Ren，Yaqi3; Wang，Minkang4; He，Jijun5; Huo，Weirong4; Tang，Hui4

2020

10.1186/s11671-020-03355-4

Nanoscale Research Letters   影响因子和分区

1931-7573

1556-276X

Polyethylene oxide (PEO)-based solid polymer electrolyte (SPE) is considered to have great application prospects in all-solid-state li-ion batteries. However, the application of PEO-based SPEs is hindered by the relatively low ionic conductivity, which strongly depends on its crystallinity and density of grain boundaries. In this work, a simple and effective press-rolling method is applied to reduce the crystallinity of PEO-based SPEs for the first time. With the rolled PEO-based SPE, the LiFePO/SPE/Li all-solid li-ion battery delivers a superior rechargeable specific capacity of 162.6 mAh g with a discharge-charge voltage gap of 60 mV at a current density of 0.2 C with a much lower capacity decay rate. The improvement of electrochemical properties can be attributed to the press-rolling method, leading to a doubling conductivity and reduced activation energy compared with that of electrolyte prepared by traditional cast method. The present work provides an effective and easy-to-use grain reforming method for SPE, worthy of future application.

Grain boundary Li-ion battery Polyethylene oxide Reforming Solid-state electrolyte

SCI ; EI

英语

通讯

National Natural Science Foundation of China[51702040][51402045] ; Fundamental Research Funds for the Central Universities[ZYGX2017KYQD193][ZYGX2018J084] ; Guangdong Provincial Key Laboratory of Energy Materials for Electric Power[2018B030322001] ; Major Project of Education Department in Sichuan[18ZB0229] ; Sichuan Province Science and Technology Support Program[20YYJC4163][18ZDYF2973]

Science & Technology - Other Topics ; Materials Science ; Physics

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied

WOS:000535678200001

SPRINGER

20202208760418

Polyethylene oxides ; Ions ; Crystallinity ; Lithium-ion batteries ; Polyelectrolytes ; Presses (machine tools) ; Activation energy ; Lithium compounds ; Decay (organic) ; Solid electrolytes

Machine Tools, General:603.1 ; Biochemistry:801.2 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Organic Polymers:815.1.1 ; Polymer Products:817.1 ; Crystalline Solids:933.1

2-s2.0-85085269899

Scopus

1.School of Physics,University of Electronic Science and Technology of China,Chengdu,611731,China
2.Guangdong Provincial Key Laboratory of Energy Materials for Electric Power,Southern University of Science and Technology,Shenzhen,518055,China
3.School of Materials and Environmental Engineering,Chengdu Technological University,Chengdu,611730,China
4.School of Materials and Energy,University of Electronic Science and Technology of China,Chengdu,611731,China
5.School of Mechanical and Electrical Engineering,University of Electronic Science and Technology of China,Chengdu,611731,China

Wei，Zhaohuan,Ren，Yaqi,Wang，Minkang,et al. Improving the Conductivity of Solid Polymer Electrolyte by Grain Reforming[J]. Nanoscale Research Letters,2020,15(1).

Wei，Zhaohuan,Ren，Yaqi,Wang，Minkang,He，Jijun,Huo，Weirong,&Tang，Hui.(2020).Improving the Conductivity of Solid Polymer Electrolyte by Grain Reforming.Nanoscale Research Letters,15(1).

Wei，Zhaohuan,et al."Improving the Conductivity of Solid Polymer Electrolyte by Grain Reforming".Nanoscale Research Letters 15.1(2020).