A Multifunctional Electrolyte Additive With Solvation Structure Regulation and Electrode/Electrolyte Interface Manipulation Enabling High‐Performance Li‐Ion Batteries in Wide Temperature Range. Issue 16 (11th March 2023)

• Record Type: Journal Article
• Authors: Lan, Xiwei; Yang, Shanshan; Meng, Tao; Zhang, Chaosheng; Hu, Xianluo
• Is Part Of: Advanced energy materials. Volume 13:Issue 16(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2023-03-11
• Subjects: electrolyte additives -- interface manipulation -- lithium‐ion batteries -- solvation structure -- wide temperature range; Energy harvesting -- Materials -- Periodicals; Energy conversion -- Materials -- Periodicals; Energy storage -- Materials -- Periodicals; Photovoltaics -- Periodicals; Fuel cells -- Periodicals; Thermoelectric materials -- Periodicals; 621.31
• DOI: 10.1002/aenm.202203449
• Languages: English
• ISSNs: 1614-6832

Abstract

Abstract: Improving the tolerance of Li‐ion batteries (LIBs) to extreme temperatures and climates worldwide is vital to their global uptake. However, LIBs call for more strict requirements for the key components when operated in a wide temperature range, especially synchronously desirable interfacial kinetics and thermal stability. Here, a novel multifunctional electrolyte additive, N ‐tert‐butyl‐2‐thiophenesulfonamide (NTSA), to fabricate stable LIBs under wide‐temperature conditions, is reported. The Li‐ion solvation structure in the electrolyte is regulated and involves less coordinated solvents (particularly fluoroethylene carbonate), leading to superior Li + transportation. The effective NTSA additive is preferentially decomposed to form a uniform electrode/electrolyte interface with abundant multiphase inorganic LiF, Li3 N, and LiS species simultaneously on the cathode and anode surface. The resulting inorganic‐rich interface can not only boost the interfacial Li‐ion transfer kinetics at low temperatures but also protect the active material and enhance the thermal stability of the interface and LIB devices at high temperatures. By adopting the NTSA‐containing electrolyte, LiCoO2 ||ω‐Li3 V2 O5 LIBs can be stably cycled in a wide temperature range between −30 °C and 80 °C, delivering a high capacity of ≈100.1 mAh g −1 (0.2 A g −1 ) at −20 °C and high capacity retention of 94.5% after 200 cycles (0.5 A g −1 ) at 55 °C. Abstract : A unique multifunctional electrolyte additive of N ‐tert‐butyl‐2‐thiophenesulfonamide is developed for Li‐ion batteries that is workable in a wide temperature range. The additive is demonstrated to regulate the Li + solvation structure in the electrolyte and construct uniform inorganic‐rich interfaces with LiF, Li3 N, and LiS species on the cathode and anode surface, enabling superior interfacial Li‐ion kinetics and high thermal stability, simultaneously.