TY - JOUR
T1 - Water-based phytic acid-crosslinked supramolecular binders for lithium-sulfur batteries
AU - Wang, Hui
AU - Yang, Yu
AU - Zheng, Peitao
AU - Wang, Yinyan
AU - Ng, Sze Wing
AU - Chen, Yukun
AU - Deng, Yonghong
AU - Zheng, Zijian
AU - Wang, Chaoyang
N1 - Funding Information:
This work was financially supported by Natural Science Foundation of Guangdong Province ( 2019A1515010595 ), Key-Area Research and Development Program of Guangdong Province ( 2019B090908001 ), National Natural Science Foundation of China ( 21805127 ), Open Fund for Key Lab of Guangdong High Property and Functional Macromolecular Materials ( 20190012 ), Fundamental Research Program of Shenzhen ( JCYJ2018030512351278 ), International Cooperative Research Program of Shenzhen ( GJHZ20180411143536149 ) and Guangdong Provincial Key Laboratory of Energy Materials for Electric Power ( 2018B030322001 ).
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/9/1
Y1 - 2020/9/1
N2 - Rechargeable Li-S batteries have drawn much attention because of their high theoretical energy density (2600 Wh kg−1) and environmental friendliness. However, Li-S batteries undergo complex phase transitions and large volume changes during the charge-discharge process, which greatly decreases the lifetimes of Li-S batteries. Here, we investigate the use of water-based phytic acid-crosslinked supramolecular binders in the sulfur cathode to prolong charge-discharge cycling of Li-S batteries. The supramolecular binder is fabricated with a mixture of phosphorylated soybean protein isolate (P-SPI), poly(ethylene oxide) (PEO), and phytic acid (PA), which is denoted by SPP. Strong adsorption of polysulfides by the SPP binder is verified by using UV–vis spectroscopy with an in situ battery. In the sulfur cathodes, the three-dimensional carbon (3DC) with the specific surface area of 2208 m2/g and the total pore volume of 1.64 cm3/g is used as sulfur hosts. The high discharge capacity of 932.8 mAh g−1 is achieved by SPP-based Li-S batteries at a high sulfur loading of 8.9 mg cm−2 at 0.1C. A discharge capacity at 1C is 629.7 mAh g−1, with stable cycling over 800 charge-discharge cycles, and a capacity attenuation of only 0.0298% per cycle. The coulombic efficiency remained at 99.7%. The new type of water-based supramolecular polymer binder has high potential for use in high-energy-density Li-S batteries.
AB - Rechargeable Li-S batteries have drawn much attention because of their high theoretical energy density (2600 Wh kg−1) and environmental friendliness. However, Li-S batteries undergo complex phase transitions and large volume changes during the charge-discharge process, which greatly decreases the lifetimes of Li-S batteries. Here, we investigate the use of water-based phytic acid-crosslinked supramolecular binders in the sulfur cathode to prolong charge-discharge cycling of Li-S batteries. The supramolecular binder is fabricated with a mixture of phosphorylated soybean protein isolate (P-SPI), poly(ethylene oxide) (PEO), and phytic acid (PA), which is denoted by SPP. Strong adsorption of polysulfides by the SPP binder is verified by using UV–vis spectroscopy with an in situ battery. In the sulfur cathodes, the three-dimensional carbon (3DC) with the specific surface area of 2208 m2/g and the total pore volume of 1.64 cm3/g is used as sulfur hosts. The high discharge capacity of 932.8 mAh g−1 is achieved by SPP-based Li-S batteries at a high sulfur loading of 8.9 mg cm−2 at 0.1C. A discharge capacity at 1C is 629.7 mAh g−1, with stable cycling over 800 charge-discharge cycles, and a capacity attenuation of only 0.0298% per cycle. The coulombic efficiency remained at 99.7%. The new type of water-based supramolecular polymer binder has high potential for use in high-energy-density Li-S batteries.
KW - Adsorption
KW - Bioresource
KW - Lithium-sulfur battery
KW - Polymer binder
KW - Supramolecular chemistry
UR - http://www.scopus.com/inward/record.url?scp=85083375373&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2020.124981
DO - 10.1016/j.cej.2020.124981
M3 - Journal article
AN - SCOPUS:85083375373
SN - 1385-8947
VL - 395
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 124981
ER -