Kim Sanghoon, Alauzun Johan G, Louvain Nicolas, Brun Nicolas, Stievano Lorenzo, Boury Bruno, Monconduit Laure, Mutin P Hubert
Institut Charles Gerhardt Montpellier, UMR 5253 Univ. Montpellier-CNRS-ENSCM Montpellier France
Réseau sur le Stockage Electrochimique de l'Energie (RS2E), CNRS FR3459, 33 Rue Saint Leu 80039 Amiens Cedex France.
RSC Adv. 2018 Sep 20;8(57):32558-32564. doi: 10.1039/c8ra05928d. eCollection 2018 Sep 18.
We report here a simple process for the synthesis of LiTiO(LTO)/carbon nanocomposites by a one-pot method using an alginic acid aquagel as a template and carbon source, and lithium acetate and TiO nanoparticles as precursors to the LTO phase. The carbon content can be tuned by adjusting the relative amount of alginic acid. The obtained materials consist of nanosized primary particles of LTO (30 nm) forming micron-sized aggregates covered by well-dispersed carbon (from 3 to 19 wt%). The homogeneous dispersion of carbon over the particles improves the electrochemical performance of LTO electrodes such as rate capability (>95 mA h g at 40C) and cycling performance (>98% of retention after 500 cycles at 5C), even with only 3% of carbon black additive in the electrode formulation. With a simple and easily up-scalable synthesis, the LTO/carbon nanocomposites of this study are promising candidates as anode materials for practical application in lithium-ion batteries.
我们在此报告一种简单的方法，通过一锅法合成LiTiO（LTO）/碳纳米复合材料，该方法使用海藻酸水凝胶作为模板和碳源，醋酸锂和TiO纳米颗粒作为LTO相的前驱体。可以通过调节海藻酸的相对量来调整碳含量。所获得的材料由LTO纳米级初级颗粒（30nm）组成，形成微米级聚集体，表面覆盖有分散良好的碳（3至19wt%）。碳在颗粒上的均匀分散改善了LTO电极的电化学性能，如倍率性能（40°C下>95 mA h g）和循环性能（5°C下500次循环后保留率>98%），即使电极配方中仅含有3%的炭黑添加剂。通过简单且易于放大的合成方法，本研究中的LTO/碳纳米复合材料有望成为锂离子电池实际应用中的阳极材料。
