Humate-assisted Synthesis of MoS2/C Nanocomposites via Co-Precipitation/Calcination Route for High Performance Lithium Ion Batteries

Abstract

A facile, cost-effective, non-toxic, and surfactant-free route has been developed to synthesize MoS2/carbon (MoS2/C) nanocomposites. Potassium humate consists of a wide variety of oxygen-containing functional groups, which is considered as promising candidates for functionalization of graphene. Using potassium humate as carbon source, two-dimensional MoS2/C nanosheets with irregular shape were synthesized via a stabilized co-precipitation/calcination process. Electrochemical performance of the samples as an anode of lithium ion battery was measured, demonstrating that the MoS2/C nanocomposite calcinated at 700 °C (MoS2/C-700) electrode showed outstanding performance with a high discharge capacity of 554.9 mAh g− 1 at a current density of 100 mA g− 1 and the Coulomb efficiency of the sample maintained a high level of approximately 100% after the first 3 cycles. Simultaneously, the MoS2/C-700 electrode exhibited good cycling stability and rate performance. The success in synthesizing MoS2/C nanocomposites via co-precipitation/calcination route may pave a new way to realize promising anode materials for high-performance lithium ion batteries.Electronic supplementary materialThe online version of this article (10.1186/s11671-018-2537-y) contains supplementary material, which is available to authorized users.

Characterization and Preparation of Nano-porous Carbon Derived from Hemp Stems as Anode for Lithium-Ion Batteries

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Effect of Deep Cryogenic Activated Treatment on Hemp Stem-Derived Carbon Used as Anode for Lithium-Ion Batteries

“…The first discharge specific capacity and charge specific capacity of CAC-500 are 2469.7 mAh/g and 1168.1 mAh/g, respectively. The relatively poor coulomb efficiency of first cycle (only about 36%) is in a good agreement with the common characteristics of lithium-ion batteries cycle performance [ 38 , 39 ]. It is the large amount of lithium ions consumed by the solid electrolyte interface (SEI) film formed in the first cycle due to the large specific surface area that leads to the huge capacitance loss of the first cycle.…”

Creating Unidirectional Fast Ion Diffusion Channels in G/NiS2‐MoS2 Heterostructures for High‐Performance Sodium‐Ion Batteries

“…In Figure 2l, two peaks at 229.43 eV and 232.58 eV are related to the characteristic peaks of Mo 3d 5/2 and Mo 3d 3/2 . [ 33 ] The S 2s peak neighboring to the Mo 3d region can be divided into two peaks at 226.23 and 227.03 eV, indicating S is chemically bonded with Mo and Ni ions (Mo‐S and Ni‐S). Figure 2m shows the spectra of the Ni region.…”