scholarly journals Structural characterization and electrochemical performance of macroporous graphite-like C3N3 prepared by the Wurtz reaction and heat treatment

RSC Advances ◽  
2017 ◽  
Vol 7 (69) ◽  
pp. 44001-44008 ◽  
Author(s):  
Hao Yin ◽  
Qixun Guo ◽  
Dingzeng He ◽  
Juntao Li ◽  
Shigang Sun
Keyword(s):  
Heat Treatment ◽  
Electrochemical Performance ◽  
Structural Characterization ◽  
Coulombic Efficiency ◽  
Reversible Capacity ◽  
Initial Coulombic Efficiency ◽  
Wurtz Reaction

g-C3N3 is synthesized by a facile method and further heat treatment can improve the initial coulombic efficiency and reversible capacity.

Nano-size porous carbon spheres as a high-capacity anode with high initial coulombic efficiency for potassium-ion batteries

2020 ◽  
Vol 5 (5) ◽  
pp. 895-903 ◽  
Author(s):  
Hehe Zhang ◽  
Chong Luo ◽  
Hanna He ◽  
Hong-Hui Wu ◽  
Li Zhang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Porous Carbon ◽  
Coulombic Efficiency ◽  
High Capacity ◽  
Potassium Ion ◽  
Carbon Spheres ◽  
Hard Carbon ◽  
Porous Carbon Spheres ◽  
Nano Size ◽  
Initial Coulombic Efficiency

An anode of hard carbon spheres with both small size and a porous structure enables superior electrochemical performance of potassium-ion batteries.

Boron-doped porous Si anode materials with high initial coulombic efficiency and long cycling stability

2018 ◽  
Vol 6 (7) ◽  
pp. 3022-3027 ◽  
Author(s):  
Ming Chen ◽  
Bo Li ◽  
Xuejiao Liu ◽  
Ling Zhou ◽  
Lin Yao ◽  
...  
Keyword(s):  
Anode Materials ◽  
Coulombic Efficiency ◽  
Reversible Capacity ◽  
Cycling Performance ◽  
Cycling Stability ◽  
Porous Si ◽  
Boron Doped ◽  
Si Anode ◽  
Initial Coulombic Efficiency

B-Doped pSi exhibits an exceptionally high initial coulombic efficiency of 89% and shows outstanding cycling performance (reversible capacity of 1500 mA h g−1 at 2 A g−1 after 300 cycles).

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.

Alleviating the initial coulombic efficiency loss and enhancing the electrochemical performance of Li1.2Mn0.54Ni0.13Co0.13O2 using β-MnO2

2019 ◽  
Vol 489 ◽  
pp. 336-345
Author(s):  
Murugan Vivekanantha ◽  
Thamodaran Partheeban ◽  
Thangaian Kesavan ◽  
Chenrayan Senthil ◽  
Manickam Sasidharan
Keyword(s):  
Electrochemical Performance ◽  
Coulombic Efficiency ◽  
Efficiency Loss ◽  
Initial Coulombic Efficiency

Electrochemical construction and sodium storage performance of three-dimensional porous self-supported MoS2 electrodes

2018 ◽  
Vol 11 (03) ◽  
pp. 1850050 ◽  
Author(s):  
Xiao-Yong Fan ◽  
Pan Liu ◽  
Shan Wang ◽  
Jiaxing Han ◽  
Kefan Ni ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Coulombic Efficiency ◽  
Three Dimensional ◽  
Reversible Capacity ◽  
Volumetric Expansion ◽  
Storage Performance ◽  
High Temperature Heat Treatment ◽  
Heat Treated ◽  
Electrochemical Cycling ◽  
Sodium Storage

Three-dimensional (3D) porous self-supported MoS2 electrodes are constructed by electrodepositing coupled with high-temperature heat treatment using 3D porous Cu prepared via electroless plating as the substrate, and directly used as anode of sodium-ion battery. The 3D porous structure can accommodate the volumetric expansion/shrinkage and alleviate the stress caused from the large volumetric changes of MoS2 electrodes during electrochemical cycling. Meanwhile, large surface area of this unique configuration enables sufficient electrode/electrolyte interaction and fast electron transportation. Besides, the influence of heat treatment temperatures on the sodium storage performance of MoS2 electrode is also investigated. The electrochemical test result shows that the 3D porous self-supported MoS2 electrode heat treated at 350[Formula: see text]C has the best electrochemical performance. It demonstrates a high first reversible capacity of 714.1[Formula: see text]mAh g[Formula: see text] at 50[Formula: see text]mA g[Formula: see text] with a high first Coulombic efficiency of 84%, and a good capacity retention of 306.8[Formula: see text]mAh g[Formula: see text] after 100 cycles at 2[Formula: see text]A g[Formula: see text]. The reversible capacity at 3.2[Formula: see text]A g[Formula: see text] shows high value of 241[Formula: see text]mAh g[Formula: see text], which is 37% of that at 0.05[Formula: see text]A g[Formula: see text].

scholarly journals Dramatically enhanced reversibility of Li2O in SnO2-based electrodes: the effect of nanostructure on high initial reversible capacity

2016 ◽  
Vol 9 (2) ◽  
pp. 595-603 ◽  
Author(s):  
Renzong Hu ◽  
Dongchang Chen ◽  
Gordon Waller ◽  
Yunpeng Ouyang ◽  
Yu Chen ◽  
...  
Keyword(s):  
Coulombic Efficiency ◽  
Reversible Capacity ◽  
Initial Coulombic Efficiency

Suppressing the Sn coarsening in the Li2O matrix enabled highly reversible conversion between Li2O and SnO2 and an initial Coulombic efficiency of ∼95.5% was achieved.

scholarly journals Partially Fluorinated Ether as an Electrolyte Additive to Modify Electrode Surface and Suppress Dissolution of Polysulfides in Li-S Batteries

2018 ◽  
Vol 4 (1) ◽  
pp. 39-46 ◽  
Author(s):  
Feng Qian ◽  
Jie Shao ◽  
Yu Chen ◽  
Guobin Zhu ◽  
Qunting Qu ◽  
...  
Keyword(s):  
Surface Layer ◽  
Electrode Surface ◽  
Reaction Kinetic ◽  
Coulombic Efficiency ◽  
Reversible Capacity ◽  
Electrode Reaction ◽  
Modify Electrode ◽  
Electrolyte Additive ◽  
Fluorinated Ether ◽  
Initial Coulombic Efficiency

Abstract1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether (TTE), a kind of fluorinated ether, was used as an electrolyte additive for Li-S batteries. A compact, smooth, and homogenous surface layer was formed on lithium anode at the optimized amount of added TTE. In addition, TTE additive played a crucial role in modifying the composition of the passivation layer on the sulfur/carbon cathode. Consequently, the dissolution and shuttling of polysulfides were effectively prevented. The reversible capacity, initial coulombic efficiency, electrode reaction kinetic, and cycling stability of Li-S batteries were greatly improved.

Layered phosphorus-like GeP5: a promising anode candidate with high initial coulombic efficiency and large capacity for lithium ion batteries

2015 ◽  
Vol 8 (12) ◽  
pp. 3629-3636 ◽  
Author(s):  
Wenwu Li ◽  
Huiqiao Li ◽  
Zhijuan Lu ◽  
Lin Gan ◽  
Linbo Ke ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Material ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Large Capacity ◽  
Initial Coulombic Efficiency ◽  
Very High

Layer structured GeP5 is firstly developed as an anode material for LIB, it delivers a reversible capacity of 2300 mA h g−1 with a very high initial coulombic efficiency of 95%.

scholarly journals Effects of Annealing on Electrochemical Properties of Solvothermally Synthesized Cu2SnS3 Anode Nanomaterials

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Xiaoli Peng ◽  
Chong Wen ◽  
Qian Zhang ◽  
Hang Min ◽  
Yong Xiang ◽  
...  
Keyword(s):  
High Temperature ◽  
Electrochemical Performance ◽  
Solvothermal Method ◽  
Coulombic Efficiency ◽  
Scale Up ◽  
High Capacity ◽  
Lithium Ion ◽  
Cost Effective ◽  
High Temperature Annealing ◽  
Initial Coulombic Efficiency

AbstractCu2SnS3, as a modified material for high-capacity tin-based anodes, has great potential for lithium-ion battery applications. The solvothermal method is simple, convenient, cost-effective, and easy to scale up, and has thus been widely used for the preparation of nanocrystals. In this work, Cu2SnS3 nanoparticles were prepared by the solvothermal method. The effects of high-temperature annealing on the morphology, crystal structure, and electrochemical performance of a Cu2SnS3 nano-anode were studied. The experimental results indicate that high-temperature annealing improves the electrochemical performance of Cu2SnS3, resulting in higher initial coulombic efficiency and improved cycling and rate characteristics compared with those of the as-prepared sample.

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