Atomic Interface Engineering and Electric‐Field Effect in Ultrathin Bi₂MoO₆ Nanosheets for Superior Lithium Ion Storage

Abstract

Ultrathin 2D materials can offer promising opportunities for exploring advanced energy storage systems, with satisfactory electrochemical performance. Engineering atomic interfaces by stacking 2D crystals holds huge potential for tuning material properties at the atomic level, owing to the strong layer-layer interactions, enabling unprecedented physical properties. In this work, atomically thin Bi MoO sheets are acquired that exhibit remarkable high-rate cycling performance in Li-ion batteries, which can be ascribed to the interlayer coupling effect, as well as the 2D configuration and intrinsic structural stability. The unbalanced charge distribution occurs within the crystal and induces built-in electric fields, significantly boosting lithium ion transfer dynamics, while the extra charge transport channels generated on the open surfaces further promote charge transport. The in situ synchrotron X-ray powder diffraction results confirm the material's excellent structural stability. This work provides some insights for designing high-performance electrode materials for energy storage by manipulating the interface interaction and electronic structure.

Defect Engineering on Electrode Materials for Rechargeable Batteries

“…Guo and co‐workers reported the atomically thin Bi 2 MoO 6 nanosheets with oxygen vacancies exhibited high‐rate cycling properties in lithium‐ion batteries, which was attributed to the interlayer coupling effect and the atomic defects. Especially, the uneven charge distribution around the oxygen vacancies can facilitate the ion diffusion/electron transport (Figure b) …”

Engineering of Oxygen Vacancy and Electric‐Field Effect by Encapsulating Lithium Titanate in Reduced Graphene Oxide for Superior Lithium Ion Storage

“…Zheng et al also fabricated an ultrathin Bi 2 MoO 6 nanosheet electrode with the atomic interfacial interaction and electric‐field effect. The strategy of manipulating the electronic structure and interface interaction provides profound insights for developing high‐performance electrodes . Therefore, rational designs of electrode materials with interfacial interactions between different components can be regarded as applicable to optimize the electrochemical reaction kinetics by coupling unique structural features in terms of the oxygen vacancy and electric‐field effect.…”

Zn(Cu)Si2+xP3 Solid Solution Anodes for High‐Performance Li‐Ion Batteries with Tunable Working Potentials

“…Considering the large specific capacity, phosphorus has been introduced into Si to develop binary compounds of SiP 2 and SiP. [21] However, the working potential of Bi 2 MoO 6 is slightly too high (over 1.0 V) for the anode application. Composite electrodes composed of multiple phases of different properties have been adopted to enhance performance.…”