LCME, Faculty of Science and Technology, Cadi Ayyad University, Av. A. El Khattabi, P.B. 549, Marrakesh, Morocco.
Department of Chemistry, University of Fribourg, Chemin du Musee 9, 1700, Fribourg, Switzerland.
ChemSusChem. 2019 Nov 8;12(21):4846-4853. doi: 10.1002/cssc.201902002. Epub 2019 Oct 15.
Ni Ti (PO ) /C NASICON-type phosphate is introduced as a new anode material for lithium-ion batteries (LIBs). Ni Ti (PO ) /C was synthesized through the sol-gel route and delivered some remarkable electrochemical performances. Specifically, the Ni Ti (PO ) /C electrode demonstrates a high rate capability performance and delivers high reversible capacities ranging from 130 mAh g to about 111 mAh g at current rates ranging from 0.1 C to 5 C in the voltage window of 1.85-3 V (vs. Li /Li). In the same voltage range, the material reaches an initial capacity of 105 mAh g with a capacity retention of about 82 % after 1000 cycles at the high current rate of 10 C. The electrodes are also tested in the wider voltage range of 0.5-3 V (vs. Li /Li) and show good reversibility and rate capability performance. Moreover, the Ni Ti (PO ) /C electrodes enable fast Li diffusion (in the order of 10 cm s ) compared with other NASICON-type materials. As a result, a first discharge capacity of 480 mAh g is reached.
镍钛（PO ）/C NASICON 型磷酸盐被引入作为锂离子电池（LIBs）的新型阳极材料。通过溶胶-凝胶法合成了 Ni Ti（PO ）/C，并表现出一些显著的电化学性能。具体而言，Ni Ti（PO ）/C 电极表现出高倍率性能，并在 1.85-3 V（相对于 Li /Li）的电压窗口内，在 0.1 C 至 5 C 的电流速率范围内，提供高达 130 mAh·g 的可逆容量。在相同的电压范围内，该材料在 10 C 的高电流速率下循环 1000 次后，初始容量为 105 mAh·g，容量保持率约为 82%。该电极还在更宽的电压范围 0.5-3 V（相对于 Li /Li）进行了测试，表现出良好的可逆性和倍率性能。此外，与其他 NASICON 型材料相比，Ni Ti（PO ）/C 电极能够实现快速的 Li 扩散（约为 10 厘米 /秒）。结果，达到了 480 mAh·g 的首次放电容量。
