The encapsulation of MnFe2O4 nanoparticles into the carbon framework with superior rate capability for lithium-ion batteries

Nanoscale ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 4445-4451 ◽  
Author(s):  
Weiqin Li ◽  
Cuihua An ◽  
Huinan Guo ◽  
Yan Zhang ◽  
Kai Chen ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Lithium Ion Batteries ◽  
Carbon Coating ◽  
Rate Capability ◽  
Lithium Ion ◽  
Template Method ◽  
Electrochemical Performances ◽  
Carbon Framework ◽  
Mnfe2o4 Nanoparticles

The mesoporous MnFe2O4@C nanorods has been prepared using self-template method. Benefiting from the synergistic effect of carbon coating and mesoporous feature, MnFe2O4@C displays outstanding electrochemical performances for LIBs.

Enhancing Cyclic Performance and Rate Capability of Li4Ti5O12for Lithium-Ion Batteries through Thin Carbon Coating

2018 ◽  
Vol 3 (38) ◽  
pp. 10792-10798 ◽  
Author(s):  
Xingkang Huang ◽  
Ren Ren ◽  
Niraj K. Singh ◽  
Meenakshi Hardi ◽  
Junhong Chen
Keyword(s):  
Lithium Ion Batteries ◽  
Carbon Coating ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cyclic Performance ◽  
Thin Carbon

Synergistic effect between flake graphite and small-sized graphene in lithium storage

2021 ◽  
pp. 2150031
Author(s):  
Hai Li ◽  
Chunxiang Lu
Keyword(s):  
Synergistic Effect ◽  
Lithium Ion Batteries ◽  
Individual Component ◽  
Specific Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Flake Graphite ◽  
Effective Strategy ◽  
Lithium Storage

As anode material for lithium-ion batteries, graphite has the disadvantage of relatively low specific capacity. In this work, a simple yet effective strategy to overcome the disadvantages by using a composite of flake graphite (FG) and small-sized graphene (SG) has been developed. The FG/SG composite prepared by dispersing FG and SG (90:10 w/w) in ethanol and drying delivers much higher specific capacity than that of individual component except for improved rate capability. More surprisingly, FG/SG composite delivers higher reversible capacity than its theoretical value calculated according to the theoretical capacities of graphite and graphene. Therefore, a synergistic effect between FG and SG in lithium storage is clearly discovered. To explain it, we propose a model that abundant nanoscopic cavities were formed due to physical adhesion between FG and SG and could accommodate extra lithium.

A general approach towards carbonization of plastic waste into a well-designed 3D porous carbon framework for super lithium-ion batteries

2020 ◽  
Vol 56 (64) ◽  
pp. 9142-9145 ◽  
Author(s):  
Jiakang Min ◽  
Xin Wen ◽  
Tao Tang ◽  
Xuecheng Chen ◽  
Kaifu Huo ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion Battery ◽  
Porous Carbon ◽  
Lithium Ion ◽  
Superior Performance ◽  
Template Method ◽  
Carbon Sphere ◽  
Carbon Framework ◽  
Plastic Wastes ◽  
Hollow Carbon

The 3D hollow carbon sphere/porous carbon flake hybrids are facilely prepared from the carbonization of both hydrocarbon and halogen-containing plastic wastes by a general template method, which exhibits superior performance in a lithium-ion battery.

scholarly journals Fabrication of hierarchically porous TiO2 nanofibers by microemulsion electrospinning and their application as anode material for lithium-ion batteries

2017 ◽  
Vol 8 ◽  
pp. 1297-1306 ◽  
Author(s):  
Jin Zhang ◽  
Yibing Cai ◽  
Xuebin Hou ◽  
Xiaofei Song ◽  
Pengfei Lv ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Current Density ◽  
Rapid Development ◽  
Specific Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Electrochemical Performances ◽  
Tio2 Nanofibers ◽  
Hierarchically Porous ◽  
Paraffin Oil

Titanium dioxide (TiO2) nanofibers have been widely applied in various fields including photocatalysis, energy storage and solar cells due to the advantages of low cost, high abundance and nontoxicity. However, the low conductivity of ions and bulk electrons hinder its rapid development in lithium-ion batteries (LIB). In order to improve the electrochemical performances of TiO2 nanomaterials as anode for LIB, hierarchically porous TiO2 nanofibers with different tetrabutyl titanate (TBT)/paraffin oil ratios were prepared as anode for LIB via a versatile single-nozzle microemulsion electrospinning (ME-ES) method followed by calcining. The experimental results indicated that TiO2 nanofibers with the higher TBT/paraffin oil ratio demonstrated more axially aligned channels and a larger specific surface area. Furthermore, they presented superior lithium-ion storage properties in terms of specific capacity, rate capability and cycling performance compared with solid TiO2 nanofibers for LIB. The initial discharge and charge capacity of porous TiO2 nanofibers with a TBT/paraffin oil ratio of 2.25 reached up to 634.72 and 390.42 mAh·g−1, thus resulting in a coulombic efficiency of 61.51%; and the discharge capacity maintained 264.56 mAh·g−1 after 100 cycles, which was much higher than that of solid TiO2 nanofibers. TiO2 nanofibers with TBT/paraffin oil ratio of 2.25 still obtained a high reversible capacity of 204.53 mAh·g−1 when current density returned back to 40 mA·g−1 after 60 cycles at increasing stepwise current density from 40 mA·g−1 to 800 mA·g−1. Herein, hierarchically porous TiO2 nanofibers have the potential to be applied as anode for lithium-ion batteries in practical applications.

In Situ Synthesis of Graphitized-Carbon Coated Li4Ti5O12/C Anode for High-Rate Lithium Ion Batteries

2015 ◽  
Vol 814 ◽  
pp. 358-364
Author(s):  
Peng Xiao Huang ◽  
Shui Hua Tang ◽  
Hui Peng ◽  
Xing Li
Keyword(s):  
Lithium Ion Batteries ◽  
Electrochemical Impedance ◽  
Specific Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Rate ◽  
Phase Method ◽  
Electrochemical Performances ◽  
Graphitized Carbon ◽  
Carbon Coated

Graphitized-Carbon coated Li4Ti5O12/C (Li4Ti5O12/GC) composites were prepared from Li2CO3, TiO2 and aromatic resorcinol via a facile rheological phase method. The microstructure and morphology of the samples were determined by XRD and SEM. The electrochemical performances of the samples were characterized by galvanostatic charge-discharge test and electrochemical impedance spectroscopy (EIS). The results reveal that the coating of graphitized carbon could effectively enhance the charge/transfer kinetics of the Li4Ti5O12 electrode. The Li4Ti5O12/GC could deliver a discharge specific capacity of 166 mAh/g at 0.2 C, 148 mAh/g at 1.0 C, 142 mAh/g at 3.0 C, 138 mAh/g at 5.0 C and 127 mAh/g at 10.0 C, respectively, and it still could remain at 132 mAh/g after cycled at 5.0 C for 100 cycles. The excellent rate capability of the Li4Ti5O12/C makes it a promising anode material for high rate lithium ion batteries.

scholarly journals Enhanced high voltage performance of LiNi0.5Mn0.3Co0.2O2 cathode via the synergistic effect of LiPO2F2 and FEC in fluorinated electrolyte for lithium-ion batteries

RSC Advances ◽  
2021 ◽  
Vol 11 (14) ◽  
pp. 7886-7895
Author(s):  
Rui Li ◽  
Pan Zhang ◽  
Jian Huang ◽  
Boyu Liu ◽  
Mingjiong Zhou ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Lithium Ion Batteries ◽  
High Voltage ◽  
Lithium Ion ◽  
Electrochemical Performances ◽  
Voltage Performance ◽  
Fluorinated Electrolyte

LiNi0.5Mn0.3Co0.2O2 can achieve great electrochemical performances because of the robust and protective fluorinated organic–inorganic film on the cathode, which derives from the FEC cosolvent and LiPO2F2 additive.

Synergistic Effect for LiMn2O4Microcubes with Enhanced Rate Capability and Excellent Cycle Stability for Lithium Ion Batteries

2015 ◽  
Vol 163 (2) ◽  
pp. A197-A202 ◽  
Author(s):  
Jia Lu ◽  
Xiaoyong Fan ◽  
Cuifeng Zhou ◽  
Zongwen Liu ◽  
Feng Zheng ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Lithium Ion Batteries ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cycle Stability

scholarly journals MoS2/C/C nanofiber with double-layer carbon coating for high cycling stability and rate capability in lithium-ion batteries

Nano Research ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 5866-5878 ◽  
Author(s):  
Hao Wu ◽  
Chengyi Hou ◽  
Guozhen Shen ◽  
Tao Liu ◽  
Yuanlong Shao ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Double Layer ◽  
Carbon Coating ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cycling Stability

scholarly journals Crystalline TiO2@C nanosheet anode with enhanced rate capability for lithium-ion batteries

RSC Advances ◽  
2015 ◽  
Vol 5 (119) ◽  
pp. 98717-98720 ◽  
Author(s):  
Fan Yang ◽  
Yuxuan Zhu ◽  
Xiu Li ◽  
Chao Lai ◽  
Wei Guo ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Carbon Source ◽  
Lithium Ion Batteries ◽  
Hydrofluoric Acid ◽  
Carbon Coating ◽  
Solvothermal Method ◽  
Rate Capability ◽  
Lithium Ion ◽  
Coating Technique ◽  
Facile Solvothermal Method

TiO2@C nanosheets have been obtained by a facile solvothermal method using titanate butoxide and hydrofluoric acid as precursors, followed by our novel carbon coating technique using oleic acid as the carbon source.

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