Electrochemical Properties of LLTO/Fluoropolymer-Shell Cellulose-Core Fibrous Membrane for Separator of High Performance Lithium-Ion Battery

Abstract

A superfine Li0.33La0.557TiO3 (LLTO, 69.4 nm) was successfully synthesized by a facile solvent-thermal method to enhance the electrochemical properties of the lithium-ion battery separator. Co-axial nanofiber of cellulose and Poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) was prepared by a co-axial electrospinning technique, in which the shell material was PVDF-HFP and the core was cellulose. LLTO superfine nanoparticles were incorporated into the shell of the PVDF-HFP. The core–shell composite nanofibrous membrane showed good wettability (16.5°, contact angle), high porosity (69.77%), and super electrolyte compatibility (497%, electrolyte uptake). It had a higher ionic conductivity (13.897 mS·cm−1) than those of pure polymer fibrous membrane and commercial separator. In addition, the rate capability (155.56 mAh·g−1) was also superior to the compared separator. These excellent performances endowed LLTO composite nanofibrous membrane as a promising separator for high-performance lithium-ion batteries.

An Ultrarobust Composite Gel Electrolyte Stabilizing Ion Deposition for Long‐Life Lithium Metal Batteries

“…Interestingly, the BC/LLTO CGEs exhibit greatly improved electrochemical stability with a wide working potential window of 5.6 V. The improvement of the electrochemical stability is owing to the introduction of LLTO NWs that possess a high voltage window beyond 5 V without decomposition . Meanwhile, the strong coupling effects between OH groups and Li ions of LLTO NWs help to stabilize BC . Furthermore, the interfacial compatibility between the electrolytes and Li anodes is investigated and the results are shown in Figure e.…”

Recent Advances in Poly(vinylidene fluoride) and Its Copolymers for Lithium-Ion Battery Separators

“…The incorporation of a superfine LLTO in a PVDF-HFP separator enhanced the ionic conductivity of the membrane. It was also been shown that a cell with a this type of separator presents improved discharge capacity and rate performance [ 101 ].…”

Bacterial nanocellulose as green support of platinum nanoparticles for effective methanol oxidation

“…[16,17]. Bacterial J o u r n a l P r e -p r o o f nanocellulose, BNC, has gain on its popularity due to its outstanding performances such as high crystallinity, high aspect ratio, surface reactivity, low density, low cytotoxicity, availability, appropriate porosity, high water retention capacity, superb overall mechanical properties [18][19][20][21].…”