Unique Double Carbon Protection Structured Co<sub>3</sub>O<sub>4</sub>Anode for Lithium Ion Battery

• 作者: Dawei Luo Hang He Khan Abrar Kun Li Ning Zhao Yuban Lei
• 来源期刊: 材料科学与化学工程(英文)
• 学科: 工学
• 关键词: Carbon Protection Co₃O₄ Anode Lithium Ion Battery
• 年，卷（期）: 2020,（12）
• 页码范围: 56-70
• 页数: 15页
• 分类号: TB3

摘要

In this study, novel Carbon aerogel (CA)/Co₃O₄/Carbon (C) composites with a double protective structure are synthesized through a solvothermal method and in-situ polymerization. The morphology and structure are characterized by X-ray diffraction, scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), and Fourier transform infrared spectroscopy (FTIR). The loading content of active anode material <span style="white-space:normal;">Co</span><sub style="white-space:normal;">3</sub><span style="white-space:normal;">O</span><sub style="white-space:normal;">4</sub> in the composite is investigated by thermogravimetry, and the electrochemical properties of the composite are characterized by electrochemical impedance spectroscopy (EIS). The SEM results show that the nano-sized spherical <span style="white-space:normal;">Co</span><sub style="white-space:normal;">3</sub><span style="white-space:normal;">O</span><sub style="white-space:normal;">4</sub> particle is adhered to the inner Carbon aerogel (CA). The HRTEM result indicates the thickness of the prepared Carbon (C) up to 40 nm. Nano-sheet is coated on the surface of the <span style="white-space:normal;">Co</span><sub style="white-space:normal;">3</sub><span style="white-space:normal;">O</span><sub style="white-space:normal;">4</sub> particle. Compared with the pure <span style="white-space:normal;">Co</span><sub style="white-space:normal;">3</sub><span style="white-space:normal;">O</span><sub style="white-space:normal;">4</sub> anode materials, the Carbon aerogel (CA)/<span style="white-space:normal;">Co</span><sub style="white-space:normal;">3</sub><span style="white-space:normal;">O</span><sub style="white-space:normal;">4</sub>/Carbon (C) composites have better transport kinetics for both electron and lithium-ion in EIS testing results, which may contribute to its higher specific capacity and higher first coulomb efficiency. Due to the unique structure of the composite material with double protection agai