A functional electrolyte additive enabling robust interphases in high-voltage Li‖LiNi_0.8Co_0.1Mn_0.1O₂ batteries at elevated temperatures

Abstract

Lithium metal batteries (LMBs) with Ni-rich cathode materials providing ultra-high energy density (~ 500 Wh kg-1) are expected to be the next generation of batteries. However, high-voltage LMBs exhibit inferior...

Synergistic Strategy Using Doping and Polymeric Coating Enables High-Performance High-Nickel Layered Cathodes for Lithium-Ion Batteries

“…Furthermore, the requirement of high loading of an electrode with high-performance electrochemical is one of the keys to the breakthroughs of LIBs. − We have increased the mass loading of the electrode from 3 to 13 mg cm –2 and investigated its electrochemical performance (Figure ). The initial charge–discharge results are depicted in Figure a,c.…”

Self-degrading functional unit introduction for anti-oxidation ability enhancement of a poly(vinyl ethylene carbonate) electrolyte

“…The self-decomposition is beneficial for inhibiting the redox decomposition of PEs. 14 Thus, P(VEC-SF)-PE possesses enhanced anti-oxidation ability owing to the degradation of the SF functional unit, in which a stable cathode–electrolyte interface (CEI) on the surface of the electrode can be formed.…”

“…6 For example, it is proposed that the electron density clustering around the sulfone-based functional units can cause a nucleophilic reaction with Li + at the interphase, and facilitate fast ion transport for high ionic conductivity. 14 Moreover, additives with sulfone-based molecules are effective for forming cathode–electrolyte interphases (CEIs) to improve the cycling stability of batteries. 15,16 Following these findings, herein, a copolymer electrolyte poly(vinyl ethylene carbonate-3-sulfolene) (P(VEC-SF)-PE), obtained by copolymerizing 3-sulfolene (SF) and vinyl ethylene carbonate (VEC), has been reported, which possesses high ionic conductivity, high lithium ion transference and a wide electrochemical stability window.…”

N-Rich Bilayer Solid Electrolyte Interphase toward Highly Reversible Lithium Metal Batteries

“…It is a pity that the artificial layer might be damaged during the repeated plating/ striping due to serious volume change. 17 lytes, 18 localized high-concentration electrolytes, 19,20 fluorinated solvents, 21 and electrolyte additives, 22 as efficient interface modification strategies, is considered to extend lifespan. Notably, polymer−inorganic interlayers are recommended to be constructed by the prioritized decomposition of organic additives (e.g., fluoroethylene carbonate), 23,24 while not facilitating long-term cycling.…”

“…According to previous studies, electrolytes can modulate Li nuclei morphology and interfacial reaction by modulating solid electrolyte interphase (SEI) chemistry, nanostructure, and ion transport properties. Thus, electrolyte optimization, including concentrated electrolytes, localized high-concentration electrolytes, , fluorinated solvents, and electrolyte additives, as efficient interface modification strategies, is considered to extend lifespan. Notably, polymer–inorganic interlayers are recommended to be constructed by the prioritized decomposition of organic additives (e.g., fluoroethylene carbonate), , while not facilitating long-term cycling.…”