l-Cysteine-Assisted Synthesis of Urchin-Like γ-MnS and Its Lithium Storage Properties

Abstract

MnS has been attracting more and more attentions in the fields of lithium ion batteries (LIBs) because of its high energy density and low voltage potential. In this paper, we present a simple method for the preparation of urchin-like γ-MnS microstructures using l-cysteine and MnCl2 · 4H2O as the starting materials. The urchin-like γ-MnS microstructures exhibit excellent cycling stability (823.4 mA h g−1 at a current density of 500 mA g−1, after 1000 cycles). And the discharge voltage is about 0.75 V, making it a good candidate for the application as the anode material in LIBs. SEM, TEM, and XRD were employed to inspect the changes of the active materials during the electrochemical process, which clearly indicate that the structural pulverization and reformation of the γ-MnS microstructures play important roles for the maintenance of the electrochemical performance during the charge/discharge process.

Dandelion-shaped manganese sulfide in ether-based electrolyte for enhanced performance sodium-ion batteries

“…Concordantly, as expected, the related oxidation peaks of α-MnS electrode used in LIB applications are observed at slightly higher potentials (~2 and 2.5 V) and these features are attributed to the reformation of the MnS phase 33,39 . Nevertheless, these redox features are completely different from the only one oxidation peak (around 1.5 V) observed during the anodic scan of the low-temperature γ-MnS electrode with hexagonal lattice in a lithium half-cell configuration 40,41 . Similarly, it is reasonable to conclude that, in the present case, the 2 V feature in the CV and the charge profiles of the MnS electrode are related to the fast reformation of pristine MnS via conversion reaction (Eq.…”

Review on recent progress in Manganese‐based anode materials for sodium‐ion batteries

“…71 Similar to transition-metal oxides, these sulphides suffer from poor ionic/electrical conductivity and large volume expansion, which results in rapid capacity fading and poor cycling performance. [72][73][74] In addition, the dissolution of polysulphide in the liquid electrolyte can degrade the cyclability of the electrode. 75,76 MnS, which is one of the candidates for anodes, has drawn the increased interest of researchers among several transition-metal sulphides in recent years.…”

“…Conversely, because of their higher theoretical capacity, lower cost and better mechanical stability and electrical conductivity when compared with their transition‐metal oxide counterparts, transition‐metal sulphides become an ideal choice for practical anode materials 71 . Similar to transition‐metal oxides, these sulphides suffer from poor ionic/electrical conductivity and large volume expansion, which results in rapid capacity fading and poor cycling performance 72‐74 . In addition, the dissolution of polysulphide in the liquid electrolyte can degrade the cyclability of the electrode 75,76 .…”

A Review: Enhanced Anodes of Li/Na-Ion Batteries Based on Yolk–Shell Structured Nanomaterials

“…This YS architecture not only rapidly conducted ions and electrons through high pathway porous graphene foam, but also preserved necessary tiny void space on distributed Ge quantum dots, which extremely relieved the decrease in volume energy density. The final as-prepared YS nanostructure performed 1220 mAh g −1 for 1000 cycles and ultrahigh rate capacity of 800 mAh g −1 at 40 C. Transforming the yolk shape can also give rise to large surface area and short diffusion distance [ 126 , 127 ]. Liang et al [ 72 ] designed an urchin-like Bi 2 S 3 yolk assembled from nanowires.…”