Open AccessThermal Conductive 2D Boron Nitride for High‐Performance All‐Solid‐State Lithium–Sulfur Batteries
Author(s) -
Yin Xuesong,
Wang Liu,
Kim Yeongae,
Ding Ning,
Kong Junhua,
Safanama Dorsasadat,
Zheng Yun,
Xu Jianwei,
Repaka Durga Venkata Maheswar,
Hippalgaonkar Kedar,
Lee Seok Woo,
Adams Stefan,
Zheng Guangyuan Wesley
Publication year - 2020
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202001303
Subject(s) - electrolyte , boron nitride , materials science , ionic conductivity , lithium (medication) , chemical engineering , cathode , polymer , fast ion conductor , electrical conductor , nanotechnology , chemistry , electrode , composite material , medicine , endocrinology , engineering
Polymer‐based solid‐state electrolytes are shown to be highly promising for realizing low‐cost, high‐capacity, and safe Li batteries. One major challenge for polymer solid‐state batteries is the relatively high operating temperature (60–80 °C), which means operating such batteries will require significant ramp up time due to heating. On the other hand, as polymer electrolytes are poor thermal conductors, thermal variation across the polymer electrolyte can lead to nonuniformity in ionic conductivity. This can be highly detrimental to lithium deposition and may result in dendrite formation. Here, a polyethylene oxide‐based electrolyte with improved thermal responses is developed by incorporating 2D boron nitride (BN) nanoflakes. The results show that the BN additive also enhances ionic and mechanical properties of the electrolyte. More uniform Li stripping/deposition and reversible cathode reactions are achieved, which in turn enable all‐solid‐state lithium–sulfur cells with superior performances.