Compared to other energy storage types, capacitive energy-storage serves increasingly significant roles in shortening reversible cycling times and enlarging high power than traditional batteries. It still suffers from the low pseudo-capacitive level and short of electrodes, along with low energy density. Considering the great theoretical capacity, here 1D chain-like Co₃O₄ is prepared though the thermal oxidation of the self-assembled rod-like Co-precursor. Followed by in-situ polymerization of pyrrole monomer, the Co₃O₄ were encapsulated in the transparent PPy shell. Particle size-tuning, 1D architecture-altering, conducting PPy introduction could effectively broaden the energy distribution of ions, increase the speed of ions directional transferring and improve the conductivity with protecting electrode materials. As Li-storage anodes, Co₃O₄/PPy delivers a stable capacity of 816.6 mAh g⁻¹ at 1.0 A g⁻¹ after 300 cycles. 801.3 mAh g⁻¹ at 5.0 A g⁻¹. The capacity of full-cell still delivers 526 mAh g⁻¹ at 3.0 A g⁻¹ after 50 loops. Supported by detailed kinetic analysis of CV curves, it is confirmed, (1) the nature of Co₃O₄ approaches to capacitor-like behavior; (2) its electrochemical properties are dominated by capacitive contributions with increased current density as well as cycling. This work provides an in-depth sight on Co₃O₄, and further improving its pseudo-capacitive behaviors.

与其他储能类型相比，电容性储能在缩短可逆循环时间和增加高功率方面比传统电池发挥着越来越重要的作用。它仍然遭受低伪电容水平和电极不足以及低能量密度的困扰。考虑到巨大的理论容量，此处通过自组装棒状共前驱体的热氧化来制备一维链状Co ₃ O ₄。随后进行吡咯单体Co ₃ O ₄的原位聚合被封装在透明的PPy外壳中。调整粒径，改变一维结构，进行PPy引入可有效保护离子材料，从而拓宽离子的能量分布，提高离子定向转移的速度，并提高电导率。作为锂存储阳极，在300次循环后，Co ₃ O ₄ / PPy在1.0 A g ^-1下可提供816.6 mAh g ^-1的稳定容量。801.3毫安克^-1 5.0 A G ^-1。50次循环后，全电池容量在3.0 A g ^-1时仍可提供526 mAh g ^-1。通过对CV曲线的详细动力学分析的支持，可以证实：（1）Co ₃ O的性质₄种类似电容器的行为方法；（2）其电化学特性主要由电容贡献所决定，其电流密度和循环速率均增加。这项工作提供了对Co ₃ O ₄的深入了解，并进一步改善了其伪电容性能。