MoS2/C nanosheets Encapsulated Sn@SnOx nanoparticles as high-performance Lithium-iom battery anode material

Abstract

A facile and scalable in situ synthesis strategy is developed to fabricate MoS 2 /C nanosheets encapsulated in Sn@SnO x nanoparticles as a high-performance lithium ion battery anode material. With assistance of NaCl particles, MoS 2 /C nanosheets can be in situ synthesized with Sn@SnO x nanoparticles encapsulated. In the constructed architecture, the MoS 2 /C nanosheets can not only avoid the direct exposure of Sn@SnO x to the electrolyte and preserve the structural and interfacial stabilization of Sn@SnO x nanoparticles, but also accommodate the mechanical stress induced by the volume change of Sn@SnO x nanoparticles during the charge/discharge process. As a result, tested as an anode material, the Sn@SnO x @MoS 2 @C composite exhibits super-high rate capability (950 mAh g -1 at 0.2 A g -1 , 815 mAh g -1 at 0.5 A g -1 , 715 mAh g -1 at 1.0 A g -1 , 625 mAh g -1 at 2.0 A g -1 and 500 mAh g -1 at 5.0 A g -1 ) and © 2016. This manuscript version is made available under the Elsevier user license http://www.elsevier.com/open-access/userlicense/1.0/ 2 extremely excellent cycling performance at high rate (a high capacity of 530 mAh g -1 is achieved after 800 cycles at current density of 2.0 A g -1 ). The outstanding electrochemical performance of the composite indicates high potential as anode material for high-performance lithium ion battery.

N/S Co-doped Carbon Derived From Cotton as High Performance Anode Materials for Lithium Ion Batteries

“…The diameter of the semicircle is reduced in the plots of the NS-CC electrode compared with that of the CC electrode, indicating the decreased charge-transfer resistance at the electrode/electrolyte interface after doping of N, S atoms into the carbon. On the other hand, the charge transfer resistance presents a decreasing trend along with the cycles for both CC and NS-CC electrode, which due to formation of stable SEI film and the process of activation after cycling (Pan et al, 2016 ).…”

Sn‐MoS2‐C@C Microspheres as a Sodium‐Ion Battery Anode Material with High Capacity and Long Cycle Life

“…[39,40] For the SnÀCs ample, the two peaks centered at 228.6 and 231.8 eV are attributed to Sn 3d 5/2 and Sn 3d 3/2 ,r espectively. [41,42] However,i nc omparison with that of MoS 2 -C, the characteristic peaks of Mo and Si nt he Sn-MoS 2 -C@C sample shift towards the low binding energy region, which suggestsa ni ncreased density of electron clouds aroundt he ultrathin MoS 2 nanosheets. Furthermore, compared to those of the SnÀCs ample, the two characteristicp eaks of Sn in the Sn-MoS 2 -C@C sample shift towards the high binding energy region, indicating that the oxidation state of Sn atoms in the Sn-MoS 2 -C@Cs ample increases by sharingt he electron clouds with MoS 2 nanosheets.…”

“…The binding energies of Mo 3d 3/2 and Mo 3d 5/2 and S 2p 1/2 and S 2p 3/2 are located at 228.6 and 231.8 eV, 161.3 and 169.0 eV respectively, indicating the existence of Mo 4+ and S 2− in the MoS 2 ‐C sample . For the Sn−C sample, the two peaks centered at 228.6 and 231.8 eV are attributed to Sn 3d 5/2 and Sn 3d 3/2 , respectively . However, in comparison with that of MoS 2 ‐C, the characteristic peaks of Mo and S in the Sn‐MoS 2 ‐C@C sample shift towards the low binding energy region, which suggests an increased density of electron clouds around the ultrathin MoS 2 nanosheets.…”

Applications of Tin Sulfide‐Based Materials in Lithium‐Ion Batteries and Sodium‐Ion Batteries

“…Besides, 2D‐layered MoS 2 as an inorganic graphene analogue facilitates reversible Li + intercalation/extraction and prevents agglomeration of active NPs, buffering the volume change. [ 258,259 ] Pan et al [ 75 ] grew MoS 2 with the assistance of glucose on SnS 2 nanosheets, which resulted in the formation of SnS/MoS 2 ‐C after annealing; it delivered a high reversible capacity and long cycling life of 989.7 mA h g −1 at 0.2 A g −1 after 60 cycles and 718 mA h g −1 at 2 A g −1 after 700 cycles, respectively, when used as anode material in LIBs. Moreover, ZnS can provide a good reaction reversibility and improve the initial coulombic efficiency because of the weak ZnS bond.…”