Expanding the ReS₂ Interlayer Promises High-Performance Potassium-Ion Storage

Abstract

Improving the electrochemical kinetics and the intrinsic poor conductivity of transition metal dichalcogenide (TMD) electrodes is meaningful for developing next-generation energy storage systems. As one of the most promising TMD anode materials, ReS2 shows attractive performance in potassium-ion batteries (PIBs). To overcome the poor kinetic ion diffusion and limited cycling stability of the ReS2-based electrode, herein, the interlayer distance expanding strategy was employed, and reduced graphene oxide (rGO) was introduced into ReS2. Few-layered ReS2 nanosheets were grown on the surface of the rGO with expanded interlayer distance. The prepared ReS2 nanosheets show an expanded distance (∼0.77 nm). The synthesized EI-ReS2@rGO composites were used in PIBs as anode materials. The K-ion storage mechanism of the ReS2-based anode was investigated by in situ X-ray diffraction (XRD) technology, which shows the intercalation and conversion types. The EI-ReS2@rGO nanocomposites show high specific capacities of 432.5, 316.5, and 241 mAh g–1 under 0.05, 0.2, and 1.0 A g–1 current densities and exhibit excellent reversibility at 1.0 A g–1. Overall, this strategy, which finely tunes the local chemistry and orbital hybridization for high-performance PIBs, will open up a new field for other materials.

Comprehensively Understanding the Role of Anion Vacancies on K‐Ion Storage: A Case Study of Se‐Vacancy‐Engineered VSe 2

“…The enlarged lattice spacing is believed to be beneficial for K + insertion and extraction. [31,32] In addition, we conduct a fast Fourier transition (FFT) on the HRTEM image, and the (001), (100), and (110) planes are observed (Figure 1j), [22,23] once more implying that the plasma treatment does not destroy the main crystal structure of VSe 2 . Moreover, many lattice distortions are found in the inverse FFT (IFFT) HRTEM image of P-VSe 2−x (Figure 1k), whereas they are almost invisible in the case of VSe 2 (Figure S4b, Supporting Information).…”

Carbon-coated ReS2 hierarchical nanospheres to inhibit polysulfide dissolution in ether-based electrolytes for high-performance Na-ion batteries

“…The interlayer expansion is probably attributed to lattice distortion coupled with the extremely weak interlayer coupling. 19,22 The enlarged interlayer spacing could reduce the Na + diffusion barrier and promote fast Na + insertion/extraction, thus contributing to the acceleration of the electrochemical reaction kinetics of SIBs. 5,37 Fig.…”

“…[11][12][13][14][15] As an emerging representative material of layered transition metal dichalcogenides (LTMDs), rhenium disulfide (ReS 2 ) has recently attracted increasing attention in various application fields such as electrocatalysis, electrochemical energy storage, optoelectronics, etc. [16][17][18][19] The layered structure with a large interlayer spacing of 0.61 nm and extremely weak interlayer van der Waals (vdWs) interactions (18 meV for ReS 2 vs. 460 meV for MoS 2 ) makes it highly suitable for alkali-ion batteries, especially for storage of Na-ions that have large ion sizes. [20][21][22][23] ReS 2 has a theoretical specific capacity of 428 mA h g −1 for sodium storage with intercalation coupled with a conversion mechanism.…”

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

“…Moreover, a previously reported systematic study demonstrated the better LIB performance of ReS 2 than that of MoS 2. These good features make ReS 2 a competitive material in the energy storage field. − Nevertheless, the rapid capacity fading performance has hindered the applications of ReS 2 anodes.…”