A simple synthesis method for carbon-composited lithium titanium vanadium oxide as a high-energy positive electrode material for lithium-ion batteries

IF 4.4 3区 化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR Inorganic Chemistry Communications Pub Date : 2025-03-08 DOI:10.1016/j.inoche.2025.114299
Hiroshi Nagata, Kunimitsu Kataoka
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Abstract

Improvements in energy density and cycle stability are in high demand, particularly for all-solid-state batteries, which are expected to become the next generation of batteries. Li8/7Ti2/7V4/7O2 has recently been reported as a positive electrode active material with a high theoretical capacity and has shown no degradation in sulfide-based solid-state lithium-ion batteries. This study focuses on a facile and effective method for synthesizing carbon-composited Li8/7Ti2/7V4/7O2. This approach involves concentrating a homogeneous solution containing Li, Ti, and V, followed by heat treatment at 600 °C under an Ar atmosphere for 6 h. Notably, the resulting composite (Li8/7Ti2/7V4/7O2/C) exhibited a relatively high specific capacity of over 330 mAh g−1 (Li8/7Ti2/7V4/7O2/C) at 0.13 mA cm−2 and 25 °C in a sulfide-based solid-state battery without the addition of further conductive additives, such as acetylene black.

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人们对能量密度和循环稳定性的要求越来越高,尤其是全固态电池,这种电池有望成为下一代电池。最近有报道称,Li8/7Ti2/7V4/7O2 是一种正极活性材料,具有很高的理论容量,而且在硫化物固态锂离子电池中没有降解现象。本研究的重点是采用一种简便有效的方法合成碳包覆的 Li8/7Ti2/7V4/7O2。值得注意的是,所得到的复合材料(Li8/7Ti2/7V4/7O2/C)在 0.13 mA cm-2 和 25 °C 下,在硫化物固态电池中表现出相对较高的比容量,超过 330 mAh g-1(Li8/7Ti2/7V4/7O2/C),且无需添加乙炔黑等其他导电添加剂。
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来源期刊
Inorganic Chemistry Communications
Inorganic Chemistry Communications 化学-无机化学与核化学
CiteScore
5.50
自引率
7.90%
发文量
1013
审稿时长
53 days
期刊介绍: Launched in January 1998, Inorganic Chemistry Communications is an international journal dedicated to the rapid publication of short communications in the major areas of inorganic, organometallic and supramolecular chemistry. Topics include synthetic and reaction chemistry, kinetics and mechanisms of reactions, bioinorganic chemistry, photochemistry and the use of metal and organometallic compounds in stoichiometric and catalytic synthesis or organic compounds.
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