Cobalt ditelluride (CoTe₂) is an attractive anode material for lithium-ion batteries due to its unique metallic characteristic, multiple crystal structure, and high density. However, the poor stability and slow-charging capability limit the practical application. While the effective strategy of nano-engineering brings lower volumetric capacity and more irreversible side reactions. In this work, a strategy of constructing abundant inner heterogeneous (carbon/CoTe₂) and homogeneous (orthorhombic/hexagonal CoTe₂) interfaces in submicron-scale electrode, instead of exposing the high external surface in nanoscale electrodes, is proposed. Structural, morphology, and composition characterization, combined with the electrochemical analysis reveal the multiphase interface in CoTe₂ mediated by uniform carbon coating can remarkably strengthen the structure stability and promote the electrons/ions transport. The resultant optimal electrode exhibits a superb electrochemical performance with a rising discharge capacity up to 807 mA h g⁻¹ (600.2 mA h cm⁻³) at 0.2 C (1 C = 600 mA g⁻¹) after 200 cycles, as well as a stabilized capacity of 438 mA h g⁻¹ (325.7 mA h cm⁻³) at 1 C after 400 cycles. This success can expand to other anode materials with multiple crystal phases to promote the energy storage.

由于其独特的金属特性、多晶体结构和高密度，二碲化钴 (CoTe _{2 ) 是一种极具吸引力的锂离子电池负极材料。}然而，稳定性差和慢充电能力限制了实际应用。而纳米工程的有效策略带来了更低的体积容量和更多的不可逆副反应。_{在这项工作中，构建丰富的内异质（碳/CoTe 2}）和同质（正交/六方CoTe _{2 ）}的策略）提出了亚微米级电极中的界面，而不是暴露纳米级电极中的高外表面。_{结构、形貌和成分表征，结合电化学分析表明，CoTe 2}中由均匀碳涂层介导的多相界面可以显着增强结构稳定性并促进电子/离子传输。由此产生的最佳电极表现出极好的电化学性能，在 200 次循环后，在 0.2 C（1 C = 600 mA g -1 ^）下放电容量高达 807 mA hg ^-1 （600.2 mA h cm -3 ），以及稳定容量为 438 mA hg ⁻¹ (325.7 mA h cm ⁻³) 在 1 C 下经过 400 次循环。这一成功可以扩展到其他具有多个晶相的阳极材料，以促进储能。