Details

Autor(en) / Beteiligte

• Yang, Jianzhong
• Liu, Qian
• Pupek, Krzysztof Z
• Dzwiniel, Trevor L
• Dietz Rago, Nancy L
• Cao, Jiayu
• Dandu, Naveen
• Curtiss, Larry
• Liu, Kewei
• Liao, Chen
• Zhang, Zhengcheng

Titel

Molecular Engineering to Enable High-Voltage Lithium-Ion Battery: From Propylene Carbonate to Trifluoropropylene Carbonate

Ist Teil von

• ACS energy letters, 2021-02, Vol.6 (2), p.371-378

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2021

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Molecular engineering of electrolyte structures has led to the successful application of trifluoropropylene carbonate (TFPC), a fluorinated derivative of propylene carbonate (PC), in next-generation high-voltage high-energy lithium-ion cell. In contrast to a PC-based electrolyte which cointercalates in the form of Li+-solvated species into the graphene layer and exfoliates a graphite anode, a TFPC-based electrolyte is highly compatible with a graphite anode at low potential. Additionally, it shows exceptional oxidation stability on the charged cathode surface owing to the presence of the −CF3 group. An all-fluorinated electrolyte, that is, 1.0 M LiPF6 TFPC/2,2,2-trifluoroethyl carbonate (FEMC) (1/1 volume ratio) + FEC additive, was formulated and demonstrated excellent cycling stability in a high-voltage LiNi0.5Mn0.3Co0.2O2/graphite cell cycled between 3.0 and 4.6 V.