Ultrathin Nanosheet Assembled Sn_0.91Co_0.19S₂ Nanocages with Exposed (100) Facets for High‐Performance Lithium‐Ion Batteries

Abstract

Ultrathin 2D inorganic nanomaterials are good candidates for lithium-ion batteries, as well as the micro/nanocage structures with unique and tunable morphologies. Meanwhile, as a cost-effective method, chemical doping plays a vital role in manipulating physical and chemical properties of metal oxides and sulfides. Thus, the design of ultrathin, hollow, and chemical doped metal sulfides shows great promise for the application of Li-ion batteries by shortening the diffusion pathway of Li ions as well as minimizing the electrode volume change. Herein, ultrathin nanosheet assembled Sn Co S nanocages with exposed (100) facets are first synthesized. The as-prepared electrode delivers an excellent discharge capacity of 809 mA h g at a current density of 100 mA g with a 91% retention after 60 discharge-charge cycles. The electrochemical performance reveals that the Li-ion batteries prepared by Sn Co S nanocages have high capacity and great cycling stability.

Fabrication of SnS2/Mn2SnS4/Carbon Heterostructures for Sodium-Ion Batteries with High Initial Coulombic Efficiency and Cycling Stability

“…The surface chemical state and valence state of SMS/C NBs have been studied by X-ray photoelectron spectrometer (XPS). Figure h displays the XPS spectrum of the Sn 3d core level, and the peaks centered at 485.7 and 494.2 eV are attributed to Sn 3d 5/2 and Sn 3d 3/2 of SMS/C, respectively . Meanwhile, the peaks at 642.8 and 654.0 eV are associated with Mn 2p 3/2 and Mn 2p 1/2 of SMS/C, respectively (Figure i), indicating the existence of Sn 4+ and Mn 2+ in SMS/C NBs.…”

“…Figure 1h displays the XPS spectrum of the Sn 3d core level, and the peaks centered at 485.7 and 494.2 eV are attributed to Sn 3d 5/2 and Sn 3d 3/2 of SMS/C, respectively. 32 Meanwhile, the peaks at 642.8 and 654.0 eV are associated with Mn 2p 3/2 and Mn 2p 1/2 of SMS/C, respectively (Figure 1i), 33 indicating the existence of Sn 4+ and Mn 2+ in SMS/C NBs. In contrast, the XPS spectra of pristine SnS 2 /C and MnS/C have also been investigated.…”

Rational Design of Bimetal–Organic Framework-Derived ZnSnS3 Nanodots Incorporated into the Nitrogen-Doped Graphene Framework for Advanced Lithium Storage

“…Moreover, when the rate returns back to 1.0 A g –1 , the ZnSnS 3 @NG is recoverable and durable up to 1114.2 mA h g –1 unexpectedly, highlighting the superior rate capability and tolerance. When compared with other Sn-based electrodes in LIBs (Figure c), the rate performance of ZnSnS 3 @NG in this work is highest, obviously presenting the superiority of rational-design strategy in fabrication of high-performance LIB anodes. ,,,,− …”

“…11 Moreover, the Sn 0.91 Co 0.19 S 2 anode also delivers an extraordinary capacity of 809 mA h g −1 at 100 mA g −1 with a 91% retention after 60 cycles, showing the stable cycling property. 12 As speculated, because of the different redox potentials between Sn and the transition metal, the unreacted component of the transition metal can act as an electron conductor and temporary buffer for the reactive intermediate during the alloying/dealloying process, presenting the significant self-matrix and self-conductivity effect simultaneously. 13,14 However, the uneven dispersion of two metal sulfides with successive formation can hardly achieve the heterogeneous effects.…”

Effect of Lithiation on the Microstructure of a Cobalt Foam Processed by Freeze Casting

“…[3,4] As a promising alternative, insertion-type systems such as Li-alloy-based materials or conversion-type systems such as transition-metal oxides have been actively investigated to replace graphite anodes. [5][6][7][8][9][10][11] Among them, conversion-type cobalt (Co) oxide materials, such as Co 3…”