To solve the low conductivity and huge volume change of cobalt-based anode, the tuneable Co₃O₄ structure is constructed through a template-free hydrothermal strategy and calcination under different atmosphere. Multi-shelled Co₃O₄ (MS-Co₃O₄) and pomegranate-like Co₃O₄ encapsulated in carbon (CS-Co₃O₄@C) are fabricated from the same micron-sized cobalt-based polymeric precursor. MS-Co₃O₄ manifests a capacity of 1195 mAh·g⁻¹ at a current density of 200 mA·g⁻¹ and delivers an initial coulombic efficiency (ICE) of 80.3%. In addition, CS-Co₃O₄@C delivers a reversible capacity as high as 676 mAh·g⁻¹ at 2000 mA·g⁻¹ after 500 cycles. Such high capacity, remarkable cycling and rate performances are attributed to hollow multi-shelled structure and carbon network skeleton, which promote the initial coulombic efficiency, relieve volume change and facilitate the migration of Li-ion.

为解决钴基阳极电导率低和体积变化大的问题，通过无模板水热法和不同气氛下的煅烧，构建了可调谐的Co ₃ O ₄结构。多壳Co ₃ O ₄（MS-Co ₃ O ₄）和封装在碳中的石榴状Co ₃ O ₄（CS-Co ₃ O ₄ @C）是由相同的微米大小的钴基聚合物前体制成的。MS-钴₃ ö ₄清单1195毫安时的容量·克^-1在200毫安的电流密度·克^-1初始库仑效率（ICE）为80.3％。此外，CS-Co ₃ O ₄ @C在500次循环后，在2000 mA·g ^-1时可逆容量高达676 mAh·g ^-1。如此高的容量，出色的循环和速率性能归因于中空的多壳结构和碳网络骨架，从而提高了初始库仑效率，缓解了体积变化并促进了锂离子的迁移。