In this work, a fast ionic conductor, Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP), has been successfully coated on a Ni-rich LiNi 0.8 Co 0.1 Mn 0.1 O 2 surface by an improved sol−gel method with postannealing at 575 °C. A series of electrochemical tests along with X-ray diffraction, scanning electron microscopy (SEM), energy dispersive spectrometry, transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) are executed to study the physical characteristics and electrochemical properties of pristine LiNi 0.8 Co 0.1 Mn 0.1 O 2 and LATP-coated LiNi 0.8 Co 0.1 Mn 0.1 O 2 samples. Electrochemical results show that 0.5 wt % LATPcoated LiNi 0.8 Co 0.1 Mn 0.1 O 2 exhibits the best electrochemical performance. In particular, 0.5 wt % LATP coating delivers great cycling stability with a capacity retention rate of 84.5% after 200 cycles at 2 C, while the pristine sample has a capacity retention rate of only 67.39%. The SEM-backscattered electron and TEM results of materials after cycling show that LATP coating can effectively improve the structural stability of the LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathode. KEYWORDS: lithium-ion battery, LiNi 0.8 Co 0.1 Mn 0.1 O 2 , LATP, electrochemical performances, structural stability

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In this work, we recycled anode graphite of spent lithium-ion batteries (LiBs) to prepare an ORR electrocatalyst applied in fuel cells. The discarded graphite was used as a carbon carrier and doped with N and Fe via simple pyrolysis with polyaniline and iron salt. Importantly, in comparison with the commercial Pt/C catalyst, the obtained catalyst exhibits better catalytic activity, methanol resistance and durability. Currently, fuel cells and lithium-ion batteries are served as two major energy sources in vehicles. This work provides a novel guideline for recycling the graphite anode of LiBs and paves a way forward for the application of a superior and low-cost electrocatalyst in fuels.[a

Lithium-ion batteries based on G-A-T-SGT@C anode display high specific capacity, excellent rate capability and outstanding cycling performance.

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