One-step synthesis of Ni3Sn2@reduced graphene oxide composite with enhanced electrochemical lithium storage properties

Chemical Engineering Journal

Jiang

et al. 2017

The Cu-Sn alloy compounds have low volume expansion but suffer from poor cycling performance as anode materials for lithium ion batteries (LIBs). In order to improve the electrochemical performance, the pomegranate-like porous carbon coated Cu x Sn y /Sn/SnO 2 submicrospheres assembled by nanoparticles (abbreviated as pomegranate-like Cu x Sn y /Sn/SnO 2 /C submicrospheres) were facilely prepared by in situ polymerization of dopamine (DA) on the surface of CuSn(OH) 6 submicrospheres, followed by carbonization and reduction in H 2 /Ar atmosphere. Based on the advantages of nanometer-sized particle, porous structure and amorphous carbon coated, the as-prepared pomegranate-like Cu x Sn y /Sn/SnO 2 /C submicrospheres behaved excellent cycling and rate performance as anode materials for LIBs. At the current density of 200 mA g-1 , the electrode materials could keep a capacity of 604 mAh g-1 after 150 cycles. Importantly, pomegranate-like Cu x Sn y /Sn/SnO 2 submicrospheres could maintain the initial structure after 150 cycles. Relied on the excellent electrochemical performance, the pomegranate-like Cu x Sn y /Sn/SnO 2 /C submicrospheres were expected to become a promising anode material for LIBs.

Section: Resultsmentioning

confidence: 96%

Pomegranate-like porous carbon coated CuxSny/Sn/SnO2 submicrospheres as superior lithium ion battery anode

Chemical Engineering Journal

Jiang

et al. 2017

“…After 200 cycles, the R ct values of each sample are 94.3 Ω for C/Sb10, 112.3 Ω for C/Sb7, 129.9 Ω for C/Sb5, and 135.6 Ω for C/Sb3. The very slight variation of R ct for the prepared C/Sb composites before and after 200 cycles suggests that the kinetic process is favored and structural stability is maintained …”

Section: Resultsmentioning

confidence: 99%

Nanostructured Carbon/Antimony Composites as Anode Materials for Lithium‐Ion Batteries with Long Life

Cheng

Chemistry An Asian Journal

et al. 2016

Self Cite

A series of nanostructured carbon/antimony composites have been successfully synthesized by a simple sol-gel, high-temperature carbon thermal reduction process. In the carbon/antimony composites, antimony nanoparticles are homogeneously dispersed in the pyrolyzed nanoporous carbon matrix. As an anode material for lithium-ion batteries, the C/Sb10 composite displays a high initial discharge capacity of 1214.6 mAh g(-1) and a reversible charge capacity of 595.5 mAh g(-1) with a corresponding coulombic efficiency of 49 % in the first cycle. In addition, it exhibits a high reversible discharge capacity of 466.2 mAh g(-1) at a current density of 100 mA g(-1) after 200 cycles and a high rate discharge capacity of 354.4 mAh g(-1) at a current density of 1000 mA g(-1) . The excellent cycling stability and rate discharge performance of the C/Sb10 composite could be due to the uniform dispersion of antimony nanoparticles in the porous carbon matrix, which can buffer the volume expansion and maintain the integrity of the electrode during the charge-discharge cycles.

“…As shown in Figure d and e, the quasispherical Ni 3 Sn 2 microcages could be used as anodes for high‐capacity (~700 mAh g −1 after 400 cycles at 0.2C) and high‐rate capability (530 mAh g −1 after 1000 cycles at 1C) Li‐ion batteries . Our group has prepared the graphene supported Ni 3 Sn 2 submicro spheres (as shown in Figure f‐i), which also exhibited good electrochemical cycling stability (Figure k) as an anode in LIBs …”

Section: Structures Lithiation Mechanism and Electrochemical Performentioning

confidence: 99%

“… Copyright 2014, American Chemical Society). And f) SEM image, g‐i) EDS mapping, and j) electrochemical performance of the graphene supported Ni 3 Sn 2 submicro spheres (reprinted from reference . Copyright 2016, Elsevier Ltd).…”

Section: Structures Lithiation Mechanism and Electrochemical Performentioning

confidence: 99%

Sn‐based Intermetallic Compounds for Li‐ion Batteries: Structures, Lithiation Mechanism, and Electrochemical Performances

Energy & Environ Materials

Cheng

et al. 2018

Self Cite

On account of the lower theoretical capacity of the traditional graphite, the development of reliable anode materials with high capacity and energy density for application in lithium‐ion batteries (LIBs) is zealously pursued to meet the ever‐increasing power demands for portable mobile devices or (hybrid) electronic vehicles. Recently, Sn‐based intermetallic compounds have attracted considerable research interests as the promising candidate anode materials for high‐performance LIBs in consideration of the high theoretical capacity of Sn (994 mAh g−1) and low operating voltage (below 0.6 V vs Li+/Li). The fabrication of Sn‐based intermetallic compounds is aiming at buffering the huge volumetric variation of Sn anode during lithiation/delithiation processes. Therefore, the rational construction of those anode materials with enhanced electrochemical performance is meaningful. This review is focusing on sum up the recent development in the structures, lithiation mechanism and electrochemical performances of various Sn‐based intermetallic compounds as anode materials in LIBs. The developments of modified methods for further enhancement of lithium storage performances of Sn‐based intermetallic compounds are also systematically summarized. We hope this review could provide a fundamental understanding of the Sn‐based intermetallic compounds for the application in LIBs.