Synthesis of heterostructured dual metal sulfides by a high-temperature mixing hydrothermal method as an ultra-high rate anode for Li-ion batteries

Abstract

In this research, an novel approach is reported to fabricate flower-like Cu2S/MoS2 microspheres anchored on graphene (Cu2S/MoS2/rGO) by using a high-temperature mixing hydrothermal method (HTMHM). In detail, the molybdenum source...

ZnS/CuS nanoparticles encapsulated in multichannel carbon fibers as high-performance anode materials for flexible Li-ion capacitors

“…2e) after high-temperature annealing (700 ℃). This is According to previous reports [26,27] , this heterogeneous interface can provide additional capacity and improved electrochemical stability. XPS spectroscopy was conducted to investigate the chemical compositions of ZnS/CuS-CF.…”

One-step uniform rotation solvothermal synthesis of a Li3VO4@rGO anode material with superior cycling and rate performance

“…The original capacity attenuation is triggered by the appearance of the unstable SEI film, and the subsequent increment of specific capacity is attributed to the activation of the active substance due to the gradual infiltration of the electrolyte, which is in accordance with the GCD results. 12,19,25 The specific capacity increased to 585.8 mA h g −1 after 400 cycles at 0.1 A g −1 , and this capacity is close to the theoretical capacity of Li 3 VO 4 (592 mA h g −1 ). Meanwhile, the specific capacity of Li 3 VO 4 @rGO–R can reach 424.8 mA h g −1 after 600 cycles at 1 A g −1 , whereas those of Li 3 VO 4 @rGO–T and Li 3 VO 4 –R at 0.1 A g −1 /1 A g −1 can only reach 560.1/373.5 mA h g −1 and 327.4/138.1 mA h g −1 , respectively.…”

“…2c, the initial weight loss after 25 °C is derived from the evaporation of water. 12,46 The following considerable weight loss at around 400 °C is ascribed to the combustion of graphene, and the calculated percentage of carbon is 4.99%. The nitrogen adsorption and desorption technique was then performed to quantify the specific surface area of the three samples.…”

“…9,10 Although conversion and alloy type anode materials possess higher theoretical capacity, 11 the severe volume expansion during lithiation and delithiation prevent them from achieving long cycles. [12][13][14] Therefore, an anode material with safety features, fast charging capability, and long cycling durability must be developed. 15 Li 3 VO 4 , as a new insertion anode material, has been widely studied in recent years.…”