MnS hollow microspheres combined with carbon nanotubes for enhanced performance sodium-ion battery anode

Electrochemical reaction behavior of MnS in aqueous zinc ion battery

“…In part three, the mass decline is caused by the conversion of C to CO 2 gas and MnSO 4 , with Mn 3 O 4 completely converted to Mn 2 O 3 . 33,36,37 The carbon content in MnS/C calculated according to the TGA curve is 12%.…”

Rational Design of the CoS/Co9S8@NC Composite Enabling High-Rate Sodium-Ion Storage

“…Also, TMS will undergo a serious volume change during the sodiation/desodiation, resulting in pulverization of the electrode, and form an uncontrollable solid electrolyte interphase (SEI) layer, which will both lead to unsatisfactory cycling stability. Previous studies show that the performance of TMS electrodes can be enhanced by various methods. − For example, the capacity fading problem caused by volume change during cycling can be optimized with a careful design of nanostructure TMS. − At the same time, the nanostructured TMS can also show faster ion conduction and achieve good rate performance, as it could provide more ion transport channels and shortened pathways. − The poor electrical conductivity of TMS can be modified by introducing a carbon matrix. − In addition, pseudocapacitive behaviors during charge/discharge processes through defective carbon could lead to an effective influence on boosting the high rate energy storage system. , It should be noted here that constructing novel heterostructures of TMS can improve the electrochemical kinetics of sodiation/desodiation. − This interfacial engineering allows the Sb 2 S 3 -SnS 2 heterointerface to form a built-in electric field that induces a Na + pump into the interface and then serves as an ion reservoir during electrochemical processes . Despite so much research, the study on Na + diffusion and reaction kinetics of metal sulfides is still insufficient, especially for heterostructured materials.…”

Rock-Salt MnS0.5Se0.5 Nanocubes Assembled on N-Doped Graphene Forming van der Waals Heterostructured Hybrids as High-Performance Anode for Lithium- and Sodium-Ion Batteries

“…Three peaks emerged at ∼1.63, ∼0.68, and ∼0.13 V, respectively, in the first cathodic scan. The reduction peaks at ∼1.63 and ∼0.13 V probably correspond to the insertion of Na + into MnS 0.5 Se 0.5 and the generation of metallic Mn together with Na-S/Se compounds, , while the broad peak at ∼0.68 V may attribute to the SEI layer generation and possible phase transition. ,,, In the subsequent anodic scan, the oxidation peaks at ∼0.81, ∼1.52, ∼2.03, and ∼2.19 V are associated with the multistep conversion from metallic Mn to MnS 0.5 Se 0.5 , which is very close to the investigations of α-MnS and α-MnSe in the SIB system. ,,, From the second cycle onward, the shifted reduction peak of ∼0.13 to ∼0.25 V is also attributed to the SEI formation and structural change, which is similar to the CV curves of LIB tests. , Due to the similarity of mechanism between LIBs and SIBs, the reaction equation can be described as follows The charge/discharge curves for SIB at 100 mA g –1 are displayed in Figure b, matching well with the peaks in Figure a. The first charge and discharge capacities are determined to be 420.6 and 618.6 mA h g –1 , respectively (initial Coulombic efficiency: 68.0%).…”

“…Three peaks emerged at ∼1.63, ∼0.68, and ∼0.13 V, respectively, in the first cathodic scan. The reduction peaks at ∼1.63 and ∼0.13 V probably correspond to the insertion of Na + into MnS 0.5 Se 0.5 and the generation of metallic Mn together with Na-S/Se compounds, 46,67 while the broad peak at ∼0.68 V may attribute to the SEI layer generation and possible phase transition. 21,41,46,67 In the subsequent anodic scan, the oxidation peaks at ∼0.81, ∼1.52, ∼2.03, and ∼2.19 V are associated with the multistep conversion from metallic Mn to MnS 0.5 Se 0.5 , which is very close to the investigations of α-MnS and α-MnSe in the SIB system.…”