TY - JOUR
T1 - Supramolecular Network Structured Gel Polymer Electrolyte with High Ionic Conductivity for Lithium Metal Batteries
AU - Chen, Fei
AU - Guo, Changxiang
AU - Zhou, Honghao
AU - Shahzad, Muhammad Wakil
AU - Liu, Terence
AU - Oleksandr, Sokolskyi
AU - Sun, Jining
AU - Dai, Sheng
AU - Xu, Ben Bin
N1 - Funding information: This work was supported by the National Natural Science Foundation of China (No. 21803040), Young Talent Support Plan of Xi'an Jiaotong University and the Engineering and Physical Sciences Research Council (EPSRC) Grant Nos. EP/N007921 and EP/S032886.
PY - 2022/10/26
Y1 - 2022/10/26
N2 - Polymer-based solid electrolytes (PSEs) offer great promise in developing lithium metal batteries due to their attractive features such as safety, light weight, low cost, and high processability. However, a PSE-based lithium battery usually requires a relatively high temperature (60 °C or above) to complete charge and discharge due to the poor ionic conductivity of PSEs. Herein, a gel polymer electrolytes (GPEs) film with a supramolecular network structure through a facile one-step photopolymerization is designed and developed. The crosslinked structure and quadruple hydrogen bonding fulfil the GPEs with high thermal stability and good mechanical property with a maximum tensile strain of 48%. The obtained GPEs possess a high ionic conductivity of 3.8 × 10−3 S cm−1 at 25 °C and a decomposition voltage ≥ 4.6 V (vs Li/Li+). The cells assembled with LiFePO4 cathode and Li anode, present an initial discharge specific capacity of 155.6 mAh g−1 and a good cycling efficiency with a capacity retention rate of 81.1% after 100 charges/discharge cycles at 0.1 C at ambient temperature. This work encompasses a route to develop high performance PSEs that can be operated at room temperature for future lithium metal batteries.
AB - Polymer-based solid electrolytes (PSEs) offer great promise in developing lithium metal batteries due to their attractive features such as safety, light weight, low cost, and high processability. However, a PSE-based lithium battery usually requires a relatively high temperature (60 °C or above) to complete charge and discharge due to the poor ionic conductivity of PSEs. Herein, a gel polymer electrolytes (GPEs) film with a supramolecular network structure through a facile one-step photopolymerization is designed and developed. The crosslinked structure and quadruple hydrogen bonding fulfil the GPEs with high thermal stability and good mechanical property with a maximum tensile strain of 48%. The obtained GPEs possess a high ionic conductivity of 3.8 × 10−3 S cm−1 at 25 °C and a decomposition voltage ≥ 4.6 V (vs Li/Li+). The cells assembled with LiFePO4 cathode and Li anode, present an initial discharge specific capacity of 155.6 mAh g−1 and a good cycling efficiency with a capacity retention rate of 81.1% after 100 charges/discharge cycles at 0.1 C at ambient temperature. This work encompasses a route to develop high performance PSEs that can be operated at room temperature for future lithium metal batteries.
KW - Research Article
KW - Research Articles
KW - gel polymer electrolytes (GPEs)
KW - high‐voltage electrolytes
KW - ionic conductivity
KW - lithium metal batteries
KW - supramolecular networks
KW - high-voltage electrolytes
UR - http://www.scopus.com/inward/record.url?scp=85123088709&partnerID=8YFLogxK
U2 - 10.1002/smll.202106352
DO - 10.1002/smll.202106352
M3 - Article
SN - 1613-6810
VL - 18
SP - 1
EP - 8
JO - Small
JF - Small
IS - 43
M1 - 2106352
ER -