Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University, Shanghai, 200433, China.
Angew Chem Int Ed Engl. 2017 Dec 22;56(52):16606-16610. doi: 10.1002/anie.201710555. Epub 2017 Nov 30.
Lithium-ion batteries (LIBs) are being used to power the commercial electric vehicles (EVs). However, the charge/discharge rate and life of current LIBs still cannot satisfy the further development of EVs. Furthermore, the poor low-temperature performance of LIBs limits their application in cold climates and high altitude areas. Herein, a simple prelithiation method is developed to fabricate a new LIB. In this strategy, a Li V (PO ) cathode and a pristine hard carbon anode are used to form a primary cell, and the initial Li extraction from Li V (PO ) is used to prelithiate the hard carbon. Then, the self-formed Li V (PO ) cathode and prelithiated hard carbon anode are used to form a 4 V LIB. The LIB exhibits a maximum energy density of 208.3 Wh kg , a maximum power density of 8291 W kg and a long life of 2000 cycles. When operated at -40 °C, the LIB can keep 67 % capacity of room temperature, which is much better than conventional LIBs.
锂离子电池（LIBs）被用于为商用电动汽车（EVs）提供动力。然而，目前 LIBs 的充电/放电速率和寿命仍不能满足 EVs 的进一步发展。此外，LIBs 较差的低温性能限制了它们在寒冷气候和高海拔地区的应用。在此，开发了一种简单的预锂化方法来制造新型 LIB。在该策略中，使用 LiV(PO )阴极和原始硬碳阳极形成原电池，并且从 LiV(PO )中初始提取 Li 用于预锂化硬碳。然后，自形成的 LiV(PO )阴极和预锂化的硬碳阳极用于形成 4V LIB。LIB 表现出 208.3 Wh kg 的最大能量密度、8291 W kg 的最大功率密度和 2000 次循环的长寿命。在-40°C 下运行时，LIB 可以保持室温容量的 67%，这比传统 LIB 要好得多。
