Enhanced Electrochemical Performance of Poly(ethylene oxide) Composite Polymer Electrolyte via Incorporating Lithiated Covalent Organic Framework

Yuan Yao; Yu Cao; Gang Li; Cheng Liu; Zhongyi Jiang; Fusheng Pan; Jie Sun

doi:10.1007/s12209-021-00300-z

Transactions of Tianjin University ›› 2022, Vol. 28 ›› Issue (1) :67 -72. DOI: 10.1007/s12209-021-00300-z

Research Article

Enhanced Electrochemical Performance of Poly(ethylene oxide) Composite Polymer Electrolyte via Incorporating Lithiated Covalent Organic Framework

Yuan Yao ¹
, Yu Cao ¹
, Gang Li ²
, Cheng Liu ¹
, Zhongyi Jiang ¹^,³
, Fusheng Pan ¹^,³^,^f
, Jie Sun ¹^,^g

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¹ Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, 300072, Tianjin, China

² Sinopec Research Institute of Petroleum Processing, 100728, Beijing, China

³ Chemistry and Chemical Engineering Guangdong Laboratory, 515031, Shantou, China

^f fspan@tju.edu.cn

^g jies@tju.edu.cn

Fusheng Pan Fusheng Pan is an Associate Professor at School of Chemical Engineering and Technology of Tianjin University. He received his Ph.D. degree in School of Chemical Engineering and Technology from Tianjin University in 2009. He then worked as a postdoctoral fellow at Tsinghua University from 2009 to 2011. He was a visiting scholar of Georgia Institute of Technology in 2015. He is the recipient of Backbone Peiyang Scholar Youth Teacher of Tianjin University. His current research interests focus on the design and fabrication of membranes for liquid separation, lithium-ion battery and ECMO. To date, he has coauthored over 110 peer-reviewed scientific papers, and his h-index is 35.

Jie Sun Jie Sun is a professor at the Tianjin University, China. She earned her Ph.D. from the Beijing University of Chemical Technology and then worked as a postdoctoral at the Stanford University. Her current research interests focus on the development of multifunctional nanomaterials for energy conversion and storage, including Li-ion, Na-ion, K-ion batteries, lithium–sulfur batteries, as well as electrocatalysis.

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Abstract

The lithiated covalent organic framework (named TpPa-SO₃Li), which was prepared by a mild chemical lithiation strategy, was introduced in poly(ethylene oxide) (PEO) to produce the composite polymer electrolytes (CPEs). Li-ion can transfer along the PEO chain or across the layer of TpPa-SO₃Li within the nanochannels, resulting in a high Li-ion conductivity of 3.01 × 10⁻⁴ S/cm at 60 °C. When the CPE with 0.75 wt.% TpPa-SO₃Li was used in the LiFePO₄||Li solid-state battery, the cell delivered a stable capacity of 125 mA·h/g after 250 cycles at 0.5 C, 60 °C. In comparison, the cell using the CPE without TpPa-SO₃Li exhibited a capacity of only 118 mA·h/g.

Keywords

Lithiated covalent organic framework / Composite polymer electrolytes / Poly(ethylene oxide) / Solid-state lithium-ion batteries

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Yuan Yao, Yu Cao, Gang Li, Cheng Liu, Zhongyi Jiang, Fusheng Pan, Jie Sun. Enhanced Electrochemical Performance of Poly(ethylene oxide) Composite Polymer Electrolyte via Incorporating Lithiated Covalent Organic Framework. Transactions of Tianjin University, 2022, 28(1): 67-72 DOI:10.1007/s12209-021-00300-z

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