scholarly journals One-Pot Synthesized Amorphous Cobalt Sulfide With Enhanced Electrochemical Performance as Anodes for Lithium-Ion Batteries

2022 ◽  
Vol 9 ◽  
Author(s):  
Long-Long Ren ◽  
Lin-Hui Wang ◽  
Yu-Feng Qin ◽  
Qiang Li
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Rate Capability ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Cobalt Sulfide ◽  
Cycle Stability ◽  
One Pot ◽  
Initial Discharge ◽  
Enhanced Electrochemical Performance

In order to solve the poor cycle stability and the pulverization of cobalt sulfides electrodes, a series of amorphous and crystalline cobalt sulfides were prepared by one-pot solvothermal synthesis through controlling the reaction temperatures. Compared to the crystalline cobalt sulfide electrodes, the amorphous cobalt sulfide electrodes exhibited superior electrochemical performance. The high initial discharge and charge capacities of 2,132 mAh/g and 1,443 mAh/g at 200 mA/g were obtained. The reversible capacity was 1,245 mAh/g after 200 cycles, which is much higher than the theoretical capacity. The specific capability was 815 mAh/g at 800 mA/g and increased to 1,047 mAh/g when back to 100 mA/g, indicating the excellent rate capability. The outstanding electrochemical performance of the amorphous cobalt sulfide electrodes could result from the unique characteristics of more defects, isotropic nature, and the absence of grain boundaries for amorphous nanostructures, indicating the potential application of amorphous cobalt sulfide as anodes for lithium-ion batteries.

Synthesis and Electrochemical Performance of SnO2/Graphene Hybrid Anode for Lithium Ion Batteries

2013 ◽  
Vol 1540 ◽  
Author(s):  
Chia-Yi Lin ◽  
Chien-Te Hsieh ◽  
Ruey-Shin Juang
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Anode Material ◽  
High Performance ◽  
Coulombic Efficiency ◽  
Rate Capability ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Cycling Performance ◽  
Homogeneous Distribution

ABSTRACTAn efficient microwave-assisted polyol (MP) approach is report to prepare SnO2/graphene hybrid as an anode material for lithium ion batteries. The key factor to this MP method is to start with uniform graphene oxide (GO) suspension, in which a large amount of surface oxygenate groups ensures homogeneous distribution of the SnO2 nanoparticles onto the GO sheets under the microwave irradiation. The period for the microwave heating only takes 10 min. The obtained SnO2/graphene hybrid anode possesses a reversible capacity of 967 mAh g-1 at 0.1 C and a high Coulombic efficiency of 80.5% at the first cycle. The cycling performance and the rate capability of the hybrid anode are enhanced in comparison with that of the bare graphene anode. This improvement of electrochemical performance can be attributed to the formation of a 3-dimensional framework. Accordingly, this study provides an economical MP route for the fabrication of SnO2/graphene hybrid as an anode material for high-performance Li-ion batteries.

A Facile One-Pot Stepwise Hydrothermal Method for the Synthesis of 3D MoS2/RGO Composites with Improved Lithium Storage Properties

NANO ◽  
2019 ◽  
Vol 14 (03) ◽  
pp. 1950037 ◽  
Author(s):  
Bingning Wang ◽  
Xuehua Liu ◽  
Binghui Xu ◽  
Yanhui Li ◽  
Dan Xiu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Performance ◽  
Hydrothermal Method ◽  
Hydrothermal Treatment ◽  
Active Material ◽  
Rate Capability ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Lithium Storage ◽  
One Pot

Three-dimensional reduced graphene oxide (RGO) matrix decorated with nanoflowers of layered MoS2 (denoted as 3D MoS2/RGO) have been synthesized via a facile one-pot stepwise hydrothermal method. Graphene oxide (GO) is used as precursor of RGO and a 3D GO network is formed in the first-step of hydrothermal treatment. At the second stage of hydrothermal treatment, nanoflowers of layered MoS2 form and anchor on the surface of previously formed 3D RGO network. In this preparation, thiourea not only induces the formation of the 3D architecture at a relatively low temperature, but also works as sulfur precursor of MoS2. The synthesized composites have been investigated with XRD, SEM, TEM, Raman spectra, TGA, N2 sorption technique and electrochemical measurements. In comparison with normal MoS2/RGO composites, the 3D MoS2/RGO composite shows improved electrochemical performance as anode material for lithium-ion batteries. A high reversible capacity of 930[Formula: see text]mAh[Formula: see text][Formula: see text][Formula: see text]g[Formula: see text] after 130 cycles under a current density of 200[Formula: see text]mA[Formula: see text][Formula: see text][Formula: see text]g[Formula: see text] as well as good rate capability and superior cyclic stability have been observed. The superior electrochemical performance of the 3D MoS2/RGO composite as anode active material for lithium-ion battery is ascribed to its robust 3D structures, enhanced surface area and the synergistic effect between graphene matrix and the MoS2 nanoflowers subunit.

Li+-conductive Li2SiO3 stabilized Li-rich layered oxide with an in situ formed spinel nano-coating layer: toward enhanced electrochemical performance for lithium-ion batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (41) ◽  
pp. 34245-34253 ◽  
Author(s):  
Mingquan Xu ◽  
Qingwang Lian ◽  
Yuxin Wu ◽  
Cheng Ma ◽  
Pengfei Tan ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Coating Layer ◽  
Rate Capability ◽  
Lithium Ion ◽  
Operating Voltage ◽  
Layered Oxide ◽  
Nano Coating ◽  
Enhanced Electrochemical Performance

A novel Li2SiO3 layered@spinel heterostructured material with superior rate capability and stabilized operating voltage was achieved.

Enhanced electrochemical performance of hierarchical CoFe2O4/MnO2/C nanotubes as anode materials for lithium-ion batteries

2015 ◽  
Vol 3 (23) ◽  
pp. 12328-12333 ◽  
Author(s):  
Junjie Zhou ◽  
Ting Yang ◽  
Minglei Mao ◽  
Weiji Ren ◽  
Qiuhong Li
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Anode Materials ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Facile Preparation ◽  
Enhanced Electrochemical Performance ◽  
C Nanotubes

We report a facile preparation of MnO2 nanosheet-coated CoFe2O4 nanofibers containing carbon for lithium ion batteries. The CoFe2O4/MnO2/C nanotubes exhibit a reversible capacity of 713.6 mA h g−1 at 100 mA g−1 after 250 cycles.

Mg doped Li2FeSiO4/C nanocomposites synthesized by the solvothermal method for lithium ion batteries

2017 ◽  
Vol 46 (38) ◽  
pp. 12908-12915 ◽  
Author(s):  
Ajay Kumar ◽  
O. D. Jayakumar ◽  
Jagannath Jagannath ◽  
Parisa Bashiri ◽  
G. A. Nazri ◽  
...  
Keyword(s):  
Carbon Content ◽  
Lithium Ion Batteries ◽  
Discharge Capacity ◽  
Solvothermal Method ◽  
Rate Capability ◽  
Lithium Ion ◽  
Initial Discharge Capacity ◽  
Cycle Stability ◽  
Initial Discharge ◽  
Mg Doped

Despite having the same carbon content, Li2Fe0.99Mg0.01SiO4/C delivered the highest initial discharge capacity and also exhibited the best rate capability and cycle stability.

A peanut-like hierarchical micro/nano-Li1.2Mn0.54Ni0.18Co0.08O2 cathode material for lithium-ion batteries with enhanced electrochemical performance

2015 ◽  
Vol 3 (27) ◽  
pp. 14291-14297 ◽  
Author(s):  
Yi-di Zhang ◽  
Yi Li ◽  
Xiao-qing Niu ◽  
Dong-huang Wang ◽  
Ding Zhou ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Cathode Material ◽  
Lithium Ion Batteries ◽  
Solvothermal Method ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cyclic Stability ◽  
Enhanced Electrochemical Performance

A novel peanut-like hierarchical micro/nano-lithium-rich cathode material with superior cyclic stability and enhanced rate capability is synthesized via a solvothermal method.

scholarly journals NiO/Carbon Aerogel Microspheres with Plum-Pudding Structure as Anode Materials for Lithium Ion Batteries

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2363
Author(s):  
Renqing Guo ◽  
Xiaohua Huang ◽  
Yan Lin ◽  
Yiqi Cao
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Anode Materials ◽  
Sol Gel ◽  
Rate Capability ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Carbon Aerogel ◽  
Cycling Performance ◽  
Initial Charge

To enhance the electrochemical performance of nickel oxide as anode materials for lithium ion batteries, NiO/carbon aerogel microspheres with a plum-pudding structure were designed and prepared by a sol-gel technique followed by two calcination processes under different atmospheres. Carbon aerogel microspheres (pudding) can act as a buffering and conductive matrix to enhance the structural stability and conductivity of the embedded NiO particles (plums), which are quite advantageous to the cycling performance and rate capability. Consequently, NiO/carbon aerogel microspheres with a plum-pudding structure deliver an initial charge capacity of 808 mAh g−1 and a reversible capacity retention of 85% after 100 cycles. The enhancement in electrochemical performance relative to pure NiO microspheres suggests that the design of a plum-pudding structure is quite effective.

scholarly journals One-Pot Synthesis and High Electrochemical Performance of CuS/Cu1.8S Nanocomposites as Anodes for Lithium-Ion Batteries

Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3797 ◽  
Author(s):  
Lin-Hui Wang ◽  
Yan-Kun Dai ◽  
Yu-Feng Qin ◽  
Jun Chen ◽  
En-Long Zhou ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
High Current Density ◽  
Synthesis Method ◽  
Rate Capability ◽  
Lithium Ion ◽  
Discharge Voltage ◽  
One Pot ◽  
One Pot Synthesis ◽  
The One

CuS and Cu1.8S have been investigated respectively as anodes of lithium-ion batteries because of their abundant resources, no environment pollution, good electrical conductivity, and a stable discharge voltage plateau. In this work, CuS/Cu1.8S nanocomposites were firstly prepared simultaneously by the one-pot synthesis method at a relatively higher reaction temperature 200 °C. The CuS/Cu1.8S nanocomposites anodes exhibited a high initial discharge capacity, an excellent reversible rate capability, and remarkable cycle stability at a high current density, which could be due to the nano-size of the CuS/Cu1.8S nanocomposites and the assistance of Cu1.8S. The high electrochemical performance of the CuS/Cu1.8S nanocomposites indicated that the CuxS nanomaterials will be a potential lithium-ion battery anode.

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