【摘要】 锂金属负极具有较高的理论比容量(3 860 mAh/g)和较低的还原电势(-3.04 V vs.标准氢电势),被誉为最具发展潜力的负极材料,但是锂金属负极中的枝晶、死锂等问题阻碍了锂金属电池的商业化发展。针对锂金属负极中出现的问题,研究人员提出了大量的解决方案,其中,三维集流体不仅可以降低电流密度,缓解枝晶生长,还可以容纳锂沉积/溶解过程中发生的体积变化。而碳基三维集流体更是因其稳定的化学性质和较小的密度受到了极大的关注。从碳基三维集流体的制备、改性以及对锂沉积/溶解的影响进行介绍,并对其发展进行了展望。更多还原

【Abstract】 Lithium metal anode is regarded as the most promising anode material owing to its high theoretical specific capacity(3 860 mAh/g) and low reduction potential(-3.04 V vs. standard hydrogen potential). However, lithium dendrites and dead lithium are easily produced because of its high reactivity during cycling, which seriously restricts the commercial application of lithium metal battery. In recent years, researchers have proposed various solutions,among which 3D current collectors have attracted great attention. 3D current collector with abundant pore structure and large specific surface area can not only reduce current density and alleviate the growth of dendrite, but also accommodate the volume change during deposition/stripping. In particular, carbon-based 3D current collectors features its stable chemical property and low mass density, which can alleviate the dendrites growth without reduction of energy density. This progress report reviews the carbon-based 3D current collector from its preparation method,modification by lithiophilic materials and the mechanism about deposition/stripping. In addition, the future development of carbon-based 3D current collector is also prospected.更多还原