The need for large-scale batteries impels the development of high-performance cathode material for advanced lithium-ion batteries (LIBs). The existing cathode materials such as LiCoO₂, LiNiO₂ and LiMnO₂ were rated as potentially viable cathodes for commercial applications. Among these, LiMn₂O₄ and its composites was considered a sound cathode material for high-performance LIBs. In this study, the multi-walled carbon nanotube (MWCNT)-wrapped spinel LiMn₂O₄ nanocathode was synthesized via simple sol–gel method and characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), Raman, Impedance and galvanostatic charge/discharge analyses to study their structural, morphological, optical and electrochemical properties, respectively. XRD results reveal that the pure and MWCNT-embedded LiMn₂O₄ nanocathode exhibited similar cubic structure with space group of Fd3m. The as-fabricated MWCNT/LiMn₂O₄ battery showed the excellent reversible capacity (114 mAh g^–1) with higher coulombic efficiency after multiple cycles. Herein, simple wrapping methodology was adopted to overcome the drawbacks of the pure spinel. Incorporated MWCNT uniformly entwined in the LiMn₂O₄ and lead to prevent the volume expansion, and pulverization in surface of the active LiMn₂O₄ particles, which confirmed from post FESEM analysis and their results are discussed. Interestingly, MWCNT addition showed that the enriched electrochemical properties in LiMn₂O₄ nanoparticles are able to hold as a potential cathode for high voltage LIBs.

对大型电池的需求推动了用于先进锂离子电池 (LIB) 的高性能正极材料的开发。现有的正极材料如 LiCoO ₂、LiNiO ₂和 LiMnO ₂被评为具有商业应用潜力的正极材料。其中，LiMn ₂ O ₄及其复合材料被认为是高性能锂离子电池的良好正极材料。在本研究中，多壁碳纳米管 (MWCNT) 包裹的尖晶石 LiMn ₂ O ₄通过简单的溶胶-凝胶法合成纳米阴极，并通过 X 射线衍射 (XRD)、场发射扫描电子显微镜 (FESEM)、拉曼、阻抗和恒电流充电/放电分析对其进行表征，以研究其结构、形态、光学和电化学性质， 分别。XRD 结果表明，纯的和嵌入 MWCNT 的 LiMn ₂ O ₄纳米阴极表现出相似的立方结构，空间群为 Fd3m。制造的 MWCNT/LiMn ₂ O ₄电池显示出优异的可逆容量（114 mAh g ^–1) 在多次循环后具有更高的库仑效率。在此，采用简单的包裹方法来克服纯尖晶石的缺点。掺入的 MWCNT 均匀地缠绕在 LiMn ₂ O _{4 中}并导致防止活性 LiMn ₂ O ₄颗粒表面的体积膨胀和粉化，这从后 FESEM 分析中得到证实，并对其结果进行了讨论。有趣的是，MWCNT 的添加表明 LiMn ₂ O ₄纳米颗粒中丰富的电化学性能能够作为高压 LIB 的潜在阴极。