Construction of greenly biodegradable bacterial cellulose/UiO-66-NH composite separators for efficient enhancing performance of lithium-ion battery.

The disposal of waste lithium batteries, especially waste separators, has always been a problem, incineration and burial will cause environmental pollution, therefore, the development of degradable and high-performance separators has become an important challenge. Herein, UiO-66-NH particles were successfully anchored onto bacterial cellulose (BC) separators by epichlorohydrin (ECH) as a crosslinker, then a BC/UiO-66-NH composite separator was prepared by vacuum filtration. The ammonia groups (-NH) from UiO-66-NH can form hydrogen bonds with PF in the electrolyte, promoting lithium-ion transference.

Synthesis of PMIA/MIL-101(Cr) composite separators with high Li transmission for boosting safety and electrochemical performance of lithium-ion batteries.

Energy storage devices require separators with sufficient lithium-ion transfer and restrained lithium dendrite growth. Herein, PMIA separators tuned using MIL-101(Cr) (PMIA/MIL-101) were designed and fabricated by a one-step casting process. At 150 °C, the Cr in the MIL-101(Cr) framework sheds two water molecules to form an active metal site that complexes with PF in the electrolyte on the solid/liquid interface, leading to improved Li transport.