TY - JOUR
T1 - 70 wt% SiO2-loaded flexible PVDF quasi-solid-state electrolyte membrane for lithium oxygen batteries
AU - Wu, A-Qiang
AU - Wang, Mingxing
AU - Zhuge, Xiangqun
AU - Liu, Tong
AU - Luo, Kun
AU - Luo, Zhihong
AU - Zhong, Mian
AU - Ren, Yurong
AU - Lei, Hanhui
AU - Yuan, Zhanhui
AU - Liu, Terence Xiaoteng
PY - 2025/6/21
Y1 - 2025/6/21
N2 - Unique flexible PVDF-based quasi-solid-state electrolytes (QSSEs) with PMMA-modified nanosilica additives were successfully prepared to enhance the safety, energy density, and cycling stability of lithium oxygen batteries (LOBs). With 70 wt% of nanosilica additive (SP70), the membrane exhibited remarkable Li+ conductivity, electrolyte uptake and mechanical strength, hindering the shuttling of anions (I− and I3−) and any harmful species, without any decline in physical flexibility. Iodine was added to enhance the kinetics of the oxygen evolution reaction (OER) and expedite the decomposition of the discharge product, Li2O2. Furthermore, the cycle life of iodine-assisted LOBs was extended from 103 cycles with pristine PVDF to 402 cycles with SP70 at 1.0 A g−1 and 1000 mA h g−1 charge/discharge testing conditions. The full discharge capacity was improved to 45 336 mA h g−1, which was twice that of the LOB with the PVDF-only membrane.
AB - Unique flexible PVDF-based quasi-solid-state electrolytes (QSSEs) with PMMA-modified nanosilica additives were successfully prepared to enhance the safety, energy density, and cycling stability of lithium oxygen batteries (LOBs). With 70 wt% of nanosilica additive (SP70), the membrane exhibited remarkable Li+ conductivity, electrolyte uptake and mechanical strength, hindering the shuttling of anions (I− and I3−) and any harmful species, without any decline in physical flexibility. Iodine was added to enhance the kinetics of the oxygen evolution reaction (OER) and expedite the decomposition of the discharge product, Li2O2. Furthermore, the cycle life of iodine-assisted LOBs was extended from 103 cycles with pristine PVDF to 402 cycles with SP70 at 1.0 A g−1 and 1000 mA h g−1 charge/discharge testing conditions. The full discharge capacity was improved to 45 336 mA h g−1, which was twice that of the LOB with the PVDF-only membrane.
UR - http://www.scopus.com/inward/record.url?scp=105006689380&partnerID=8YFLogxK
U2 - 10.1039/D5NR00872G
DO - 10.1039/D5NR00872G
M3 - Article
SN - 2040-3364
VL - 17
SP - 14358
EP - 14367
JO - Nanoscale
JF - Nanoscale
IS - 23
ER -
