Freestanding ReS₂/Graphene Heterostructures as Binder-Free Anodes for Lithium-Ion Batteries

Abstract

It is still challenging to develop anode materials with high capacity and long cycling stability for lithium-ion batteries (LIBs). To address such issues, herein, for the first time, we present a three-dimensional and freestanding ReS 2 /graphene heterostructure (3DRG) as an anode synthesized via a one-pot hydrothermal method. The hybrid shows a hierarchically sandwichlike, nanoporous, and conductive three-dimensional (3D) network constructed by two-dimensional (2D) ReS 2 /graphene heterostructural nanosheets, which can be directly utilized as a freestanding and binder-free anode for LIBs. When the current density is 100 mA g −1 , the 3DRG anode delivers a high reversible specific capacity of 653 mAh g −1 . The 3DRG anode also delivers higher rate capability and cycling stability than the bare ReS 2 anode. The markedly boosted electrochemical properties derive from the unique nanoarchitecture, which guarantees massive electrochemical active sites, short channels of lithium-ion diffusion, fast electron/ion transportation, and inhibition of the volume change of ReS 2 for LIBs.

Additive-Free Anode with High Stability: Nb2CTx MXene Prepared by HCl-LiF Hydrothermal Etching for Lithium-Ion Batteries

“…The rapid development of portable electronics, electric vehicles, and energy storage power stations stimulates the growing demand for high energy density and safe lithium-ion batteries (LIBs), which, however, is greatly limited by the main commercial anode material graphite with issues such as low theoretical specific capacity (372 mAh g –1 ) and lithium dendrite growth. − In addition, for the conventional preparation process of the LIB anode, the employment of conductive agents and binders not only sacrifices the energy density and disrupts the conductive network but also leads to complexity in the process. − Therefore, developing novel LIB anodes with high capacity and free of additions is of great significance.…”

Recent Advances and Future Perspectives of Lead‐Free Halide Perovskites for Photocatalytic CO2 Reduction

“…Due to the pivotal role of photocatalysts in the CO 2 conversion reaction, it is great of importance to develop photocatalysts with outstanding properties and performances to enhance the overall efficiency of photocatalytic CO 2 conversion. [12,13] Up to now, previously enormous works have been done to research various photocatalytic materials for CO 2 photoreduction, such as perovskite oxides, [14][15][16] metal oxides, [17][18][19][20] metal sulfides, [21][22][23][24][25][26] carbon nitrides, [27][28][29] metal organic frameworks, [30][31][32] metal nitrides, [33,34] phosphides, [35][36][37] etc. However, these photocatalysts still face the issues of narrow range of optical absorption, low utilization efficiency of visible light, small efficiency of conversion solar energy to chemical energy.…”

“Fast-Charging” Anode Materials for Lithium-Ion Batteries from Perspective of Ion Diffusion in Crystal Structure

“…The overconsumption of fossil fuels and environmental degradation resulting from rapid economic expansion is perceived as an essential contributor to advanced and efficient energy storage and conversion devices . A minimum-cost, clean, high-performance electrical energy storage device acts as an attractive alternative to alleviate these risks. − In this regard, lithium-ion (Li-ion) batteries with high energy density, an energy storage device for cellular phones, electric vehicles, and other electronic products, have stimulated widespread attention from the community. − For the electric vehicles, until now, China stands as the maximum electric vehicle market and is expected to account for 59% of global electric vehicle sales by 2022. Simultaneously, battery electric vehicles and plug-in hybrids exhibit a significant growth trend (see Figure ).…”