Cobalt-Doped TaOCl3 Nanoparticles/Carbon Compounds with Advanced Specific Capacity for Lithium-Ion Batteries

2021 ◽  
pp. 163193
Author(s):  
Fenghao Liang ◽  
Lei Jiang ◽  
Zhe Zhang ◽  
Daoning Wu ◽  
Xiaochun Li ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Carbon Compounds

scholarly journals Advances in the Applications of Graphene-Based Nanocomposites in Clean Energy Materials

Crystals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 47
Author(s):  
Yiqiu Xiang ◽  
Ling Xin ◽  
Jiwei Hu ◽  
Caifang Li ◽  
Jimei Qi ◽  
...  
Keyword(s):  
Solar Cells ◽  
Fuel Cells ◽  
Lithium Ion Batteries ◽  
Electrode Materials ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Clean Energy ◽  
Proton Exchange ◽  
Energy Storage And Conversion ◽  
Thermoelectric Conversion

Extensive use of fossil fuels can lead to energy depletion and serious environmental pollution. Therefore, it is necessary to solve these problems by developing clean energy. Graphene materials own the advantages of high electrocatalytic activity, high conductivity, excellent mechanical strength, strong flexibility, large specific surface area and light weight, thus giving the potential to store electric charge, ions or hydrogen. Graphene-based nanocomposites have become new research hotspots in the field of energy storage and conversion, such as in fuel cells, lithium-ion batteries, solar cells and thermoelectric conversion. Graphene as a catalyst carrier of hydrogen fuel cells has been further modified to obtain higher and more uniform metal dispersion, hence improving the electrocatalyst activity. Moreover, it can complement the network of electroactive materials to buffer the change of electrode volume and prevent the breakage and aggregation of electrode materials, and graphene oxide is also used as a cheap and sustainable proton exchange membrane. In lithium-ion batteries, substituting heteroatoms for carbon atoms in graphene composite electrodes can produce defects on the graphitized surface which have a good reversible specific capacity and increased energy and power densities. In solar cells, the performance of the interface and junction is enhanced by using a few layers of graphene-based composites and more electron-hole pairs are collected; therefore, the conversion efficiency is increased. Graphene has a high Seebeck coefficient, and therefore, it is a potential thermoelectric material. In this paper, we review the latest progress in the synthesis, characterization, evaluation and properties of graphene-based composites and their practical applications in fuel cells, lithium-ion batteries, solar cells and thermoelectric conversion.

scholarly journals Improvement of long-term cycling performance of high-nickel cathode materials by ZnO coating

2021 ◽  
Vol 10 (1) ◽  
pp. 210-220
Author(s):  
Fangfang Wang ◽  
Ruoyu Hong ◽  
Xuesong Lu ◽  
Huiyong Liu ◽  
Yuan Zhu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Solid Phase ◽  
Low Cost ◽  
Specific Capacity ◽  
High Capacity ◽  
Lithium Ion ◽  
Side Reaction ◽  
Chemical Route ◽  
High Nickel

Abstract The high-nickel cathode material of LiNi0.8Co0.15Al0.05O2 (LNCA) has a prospective application for lithium-ion batteries due to the high capacity and low cost. However, the side reaction between the electrolyte and the electrode seriously affects the cycling stability of lithium-ion batteries. In this work, Ni2+ preoxidation and the optimization of calcination temperature were carried out to reduce the cation mixing of LNCA, and solid-phase Al-doping improved the uniformity of element distribution and the orderliness of the layered structure. In addition, the surface of LNCA was homogeneously modified with ZnO coating by a facile wet-chemical route. Compared to the pristine LNCA, the optimized ZnO-coated LNCA showed excellent electrochemical performance with the first discharge-specific capacity of 187.5 mA h g−1, and the capacity retention of 91.3% at 0.2C after 100 cycles. The experiment demonstrated that the improved electrochemical performance of ZnO-coated LNCA is assigned to the surface coating of ZnO which protects LNCA from being corroded by the electrolyte during cycling.

Cu2O Nanoparticles and Multi-Branched Nanowires as Anodes for Lithium-Ion Batteries

NANO ◽  
2018 ◽  
Vol 13 (09) ◽  
pp. 1850103 ◽  
Author(s):  
Xu Chen ◽  
Chunxin Yu ◽  
Xiaojiao Guo ◽  
Qinsong Bi ◽  
Muhammad Sajjad ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
Hydrothermal Process ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Discharge Process ◽  
Electrochemical Cycling ◽  
One Step ◽  
Cu2o Nanoparticles ◽  
Enhanced Electrochemical Performance

Novelty Cu2O multi-branched nanowires and nanoparticles with size ranging from [Formula: see text]15[Formula: see text]nm to [Formula: see text]60[Formula: see text]nm have been synthesized by one-step hydrothermal process. These Cu2O nanostructures when used as anode materials for lithium-ion batteries exhibit the excellent electrochemical cycling stability and reduced polarization during the repeated charge/discharge process. The specific capacity of the Cu2O nanoparticles, multi-branched nanowires and microscale are maintained at 201.2[Formula: see text]mAh/g, 259.6[Formula: see text]mAh/g and 127.4[Formula: see text]mAh/g, respectively, under the current density of 0.1[Formula: see text]A/g after 50 cycles. The enhanced electrochemical performance of the Cu2O nanostructures compared with microscale counterpart can be attributed to the larger contact area between active Cu2O nanostructures/electrolyte interface, shorter diffusion length of Li[Formula: see text] within nanostructures and the improved stress release upon lithiation/delithiation.

scholarly journals The influence of different Si : C ratios on the electrochemical performance of silicon/carbon layered film anodes for lithium-ion batteries

RSC Advances ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 6660-6666 ◽  
Author(s):  
Jun Wang ◽  
Shengli Li ◽  
Yi Zhao ◽  
Juan Shi ◽  
Lili Lv ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Anode Materials ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Lithium Ions ◽  
High Specific Capacity ◽  
Silicon Carbon ◽  
Silicon Based

With a high specific capacity (4200 mA h g−1), silicon based materials have become the most promising anode materials in lithium-ions batteries.

Enhanced electrochemical performance of lithium ion batteries using Sb2S3 nanorods wrapped in graphene nanosheets as anode materials

Nanoscale ◽  
2018 ◽  
Vol 10 (7) ◽  
pp. 3159-3165 ◽  
Author(s):  
Yucheng Dong ◽  
Shiliu Yang ◽  
Zhenyu Zhang ◽  
Jong-Min Lee ◽  
Juan Antonio Zapien
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Anode Materials ◽  
Graphene Nanosheets ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Lithium Insertion ◽  
Insertion Reactions ◽  
Theoretical Specific Capacity ◽  
Enhanced Electrochemical Performance

Antimony sulfide can be used as a promising anode material for lithium ion batteries due to its high theoretical specific capacity derived from sequential conversion and alloying lithium insertion reactions.

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.

An artificial sea urchin with hollow spines: improved mechanical and electrochemical stability in high-capacity Li–Ge batteries

Nanoscale ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 5812-5816 ◽  
Author(s):  
Jinyun Liu ◽  
Xirong Lin ◽  
Tianli Han ◽  
Qianqian Lu ◽  
Jiawei Long ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Sea Urchin ◽  
Specific Capacity ◽  
High Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Electrochemical Stability ◽  
High Rate ◽  
High Rate Capability ◽  
High Specific Capacity

Metallic germanium (Ge) as the anode can deliver a high specific capacity and high rate capability in lithium ion batteries.

scholarly journals The Use of Succinonitrile as an Electrolyte Additive for Composite-Fiber Membranes in Lithium-Ion Batteries

Membranes ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 45 ◽  
Author(s):  
Jahaziel Villarreal ◽  
Roberto Orrostieta Chavez ◽  
Sujay A. Chopade ◽  
Timothy P. Lodge ◽  
Mataz Alcoutlabi
Keyword(s):  
Ionic Liquid ◽  
Ionic Conductivity ◽  
Lithium Ion Batteries ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Composite Fiber ◽  
Galvanostatic Charge ◽  
Lithium Anode ◽  
Charge Discharge ◽  
Licoo2 Cathode

In the present work, the effect of temperature and additives on the ionic conductivity of mixed organic/ionic liquid electrolytes (MOILEs) was investigated by conducting galvanostatic charge/discharge and ionic conductivity experiments. The mixed electrolyte is based on the ionic liquid (IL) (EMI/TFSI/LiTFSI) and organic solvents EC/DMC (1:1 v/v). The effect of electrolyte type on the electrochemical performance of a LiCoO2 cathode and a SnO2/C composite anode in lithium anode (or cathode) half-cells was also investigated. The results demonstrated that the addition of 5 wt.% succinonitrile (SN) resulted in enhanced ionic conductivity of a 60% EMI-TFSI 40% EC/DMC MOILE from ~14 mS·cm−1 to ~26 mS·cm−1 at room temperature. Additionally, at a temperature of 100 °C, an increase in ionic conductivity from ~38 to ~69 mS·cm−1 was observed for the MOILE with 5 wt% SN. The improvement in the ionic conductivity is attributed to the high polarity of SN and its ability to dissolve various types of salts such as LiTFSI. The galvanostatic charge/discharge results showed that the LiCoO2 cathode with the MOILE (without SN) exhibited a 39% specific capacity loss at the 50th cycle while the LiCoO2 cathode in the MOILE with 5 wt.% SN showed a decrease in specific capacity of only 14%. The addition of 5 wt.% SN to the MOILE with a SnO2/C composite-fiber anode resulted in improved cycling performance and rate capability of the SnO2/C composite-membrane anode in lithium anode half-cells. Based on the results reported in this work, a new avenue and promising outcome for the future use of MOILEs with SN in lithium-ion batteries (LIBs) can be opened.

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