TY - JOUR
T1 - An organic additive assisting with high ionic conduction and dendrite resistance of polymer electrolytes
AU - GUAN, Shundong
AU - WEN, Kaihua
AU - LIANG, Ying
AU - XUE, Chuanjiao
AU - LIU, Sijie
AU - YU, Jinyao
AU - ZHANG, Zheng
AU - WU, Xinbin
AU - YUAN, Haocheng
AU - LIN, Zhiyuan
AU - YU, Haijun
AU - LI, Liangliang
AU - NAN, Ce Wen
N1 - This work was supported by the National Natural Science Foundation of China under Grant No. 51788104 and U21A2080, the Youth Beijing Scholar Program (PXM2021_014204_000023), and the Beijing Natural Science Foundation (JQ19003). We thank Mr Jun Li at Tsinghua University for his help in the measurement of thermal properties.
PY - 2022/10/27
Y1 - 2022/10/27
N2 - High-performance polymer electrolytes are desirable for developing solid-state lithium (Li) metal batteries (SSLMBs) with enhanced safety and high energy density; however, their applications are hindered by low ionic conductivity and uncontrolled Li-dendrite growth. Here, a poly(vinylidene fluoride) (PVDF)-based polymer electrolyte with an organic additive, 2-acrylamido-2-methylpropane sulfonic acid (AMPS), is synthesized. First, AMPS improves the Li+ conduction by reducing the crystallinity of PVDF and immobilizing the anions. Second, AMPS assists with the formation of a LiF/Li2Sx/Li2SO3/Li3N-rich interface between Li metal and the AMPS-PVDF polymer electrolyte (AP-PE), which effectively suppresses the growth of Li dendrites. Consequently, the AP-PE with a thickness of ∼28 μm shows a high ionic conductivity of 2.2 × 10−4 S cm−1 at 26 °C, corresponding to an ultrahigh areal conductance of 78.6 mS cm−2. Meanwhile, the AP-PE shows a large Li+ transference number of ∼0.49, good electrochemical stability against a Li metal anode, and improved cycling stability in LiFePO4- and LiCoO2-based SSLMBs.
AB - High-performance polymer electrolytes are desirable for developing solid-state lithium (Li) metal batteries (SSLMBs) with enhanced safety and high energy density; however, their applications are hindered by low ionic conductivity and uncontrolled Li-dendrite growth. Here, a poly(vinylidene fluoride) (PVDF)-based polymer electrolyte with an organic additive, 2-acrylamido-2-methylpropane sulfonic acid (AMPS), is synthesized. First, AMPS improves the Li+ conduction by reducing the crystallinity of PVDF and immobilizing the anions. Second, AMPS assists with the formation of a LiF/Li2Sx/Li2SO3/Li3N-rich interface between Li metal and the AMPS-PVDF polymer electrolyte (AP-PE), which effectively suppresses the growth of Li dendrites. Consequently, the AP-PE with a thickness of ∼28 μm shows a high ionic conductivity of 2.2 × 10−4 S cm−1 at 26 °C, corresponding to an ultrahigh areal conductance of 78.6 mS cm−2. Meanwhile, the AP-PE shows a large Li+ transference number of ∼0.49, good electrochemical stability against a Li metal anode, and improved cycling stability in LiFePO4- and LiCoO2-based SSLMBs.
UR - http://www.scopus.com/inward/record.url?scp=85142328098&partnerID=8YFLogxK
U2 - 10.1039/d2ta04229k
DO - 10.1039/d2ta04229k
M3 - Journal Article (refereed)
AN - SCOPUS:85142328098
SN - 2050-7488
VL - 10
SP - 24269
EP - 24279
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 45
ER -
