High Areal Capacity Dendrite‐Free Li Anode Enabled by Metal–Organic Framework‐Derived Nanorod Array Modified Carbon Cloth for Solid State Li Metal Batteries

• DOI: 10.1002/adfm.202001973
• Publication Date: 2020-05-14T06:22:57Z
• Authors: Tian‐Shi Wang; Xiaobin Liu; Yu Wang; Li‐Zhen Fan
• Keywords: Nanorod; Dendrite (mathematics)

Abstract Li metal is one of the most promising anode materials for high energy density batteries. However, uncontrollable dendrite growth and infinite volume change during charge/discharge process lead to safety issues capacity decay. Herein, a carbonized metal–organic framework (MOF) nanorod arrays modified carbon cloth (NRA‐CC) developed uniform plating/stripping. The MOF NRAs effectively convert CC from lithiophobic lithiophilic, decreasing polarization ensuring homogenous nucleation. 3D interconnected hierarchal provides adequate nucleation sites reducing local current avoid growth, broadens internal space buffering These characteristics afford stable cycling NRA‐CC electrode with ultrahigh Coulombic efficiencies 96.7% after 1000 h at 2 mA cm −2 prolonged lifespan 200 in symmetrical cell under areal (12 mAh ) ). solid‐state batteries assembled composite anode, high‐voltage cathode (LiNi 0.5 Co 0.2 Mn 0.3 O ), electrolyte also deliver excellent cyclic rate performance 25 °C. This work sheds fresh insights on design principles dendrite‐free safe