Electrochemical Performance of SiO/C Composites as Anode Material for Li-Ion Batteries

2015 ◽  
Vol 1092-1093 ◽  
pp. 185-190 ◽  
Author(s):  
Jing Wang ◽  
Mei Juan Zhou ◽  
Feng Wu ◽  
Shi Chen
Keyword(s):  
Discharge Capacity ◽  
Coulombic Efficiency ◽  
Weight Ratio ◽  
Heat Treating ◽  
Li Ion Batteries ◽  
X Ray Diffraction ◽  
Galvanostatic Discharge ◽  
Improved Stability ◽  
Li Ion ◽  
Initial Coulombic Efficiency

Dopamine was used as the carbon precursor to prepare SiO/C composite. Dopamine achieved self-polymerization and covered on the surface of the SiO particles in Tris-buffer, and the SiO/C composites were gained after heat-treating in the tube furnace under Argon. X-ray diffraction ( XRD ) , scanning electron microscope ( SEM ) were used to determine the phases obtained and to observe the morphologies of the composite. The galvanostatic discharge/charge test was carried out to characterize the electrochemical properties of the composite. When the sample of the mixed SiO and dopamine at a weight ratio of 1 : 3, the composite showed the best cycle ability with the discharge capacity of 1362 mAh g−1 in the first cycle, and the initial coulombic efficiency is 55.6%, after 50 cycles, the discharge capacity is 442 mAh g−1. The improved stability of the composite is attributed to carbon-coating forming during heat-treatment process.

Study on Composite of Porous Si and Disordered Carbon as Anode Materials for Lithium Ion Batteries

2012 ◽  
Vol 608-609 ◽  
pp. 1327-1330
Author(s):  
Jing Wang ◽  
Jia Li ◽  
Feng Wu ◽  
Shi Chen
Keyword(s):  
Discharge Capacity ◽  
Anode Materials ◽  
Lithium Ion ◽  
Li Ion Batteries ◽  
Porous Si ◽  
X Ray Diffraction ◽  
The Matrix ◽  
Improved Stability ◽  
Disordered Carbon ◽  
Li Ion

Silicon and related materials have recently received considerable attention as potential anodes in Li-ion batteries for their high theoretical specific capacities. To overcome the problem of volume change , composites comprising porous silicon, disordered carbon (DC) have been prepared by pyrolyzing the critic acid. This composite anode material showed a discharge capacity of 1390 mAh/g in the first cycle, and the initial columbic efficiency is 70%. After 20 cycles, the discharge capacity of the material is 511 mAh/g. The improved stability of this material is hypothesized to depend on the unique structure of porous Si and the coated DC. The morphologies of the composites were systematically investigated by the X-ray diffraction and scanning electron microscopy. It can be observed that porous Si particles were embedded into the matrix of the DC. The capacity and cycling stability of the composites were systematically evaluated by electrochemical charge/discharge tests.

Reactivating Li 2 O with Nano‐Sn to Achieve Ultrahigh Initial Coulombic Efficiency SiO Anodes for Li‐Ion Batteries

ChemSusChem ◽  
2019 ◽  
Vol 12 (14) ◽  
pp. 3377-3382 ◽  
Author(s):  
Rusheng Fu ◽  
Yongkang Wu ◽  
Chongzhao Fan ◽  
Zuxin Long ◽  
Guangjie Shao ◽  
...  
Keyword(s):  
Coulombic Efficiency ◽  
Li Ion Batteries ◽  
Li Ion ◽  
Initial Coulombic Efficiency

Nano/Micro-Structured Si/C Anodes with High Initial Coulombic Efficiency in Li-Ion Batteries

2016 ◽  
Vol 11 (8) ◽  
pp. 1205-1209 ◽  
Author(s):  
Quan Xu ◽  
Jin-Yi Li ◽  
Ya-Xia Yin ◽  
Yi-Ming Kong ◽  
Yu-Guo Guo ◽  
...  
Keyword(s):  
Coulombic Efficiency ◽  
Li Ion Batteries ◽  
Li Ion ◽  
Initial Coulombic Efficiency

Si nanoparticle clusters in hollow carbon capsules (SNC@C) as lithium battery anodes: toward high initial coulombic efficiency

Nanoscale ◽  
2019 ◽  
Vol 11 (28) ◽  
pp. 13650-13658 ◽  
Author(s):  
Tae Jin Kim ◽  
Jeong Hoon Yoon ◽  
Gi-Ra Yi ◽  
Pil J. Yoo
Keyword(s):  
High Performance ◽  
Lithium Battery ◽  
Coulombic Efficiency ◽  
Polymerization Process ◽  
Li Ion Batteries ◽  
Si Nanoparticle ◽  
Nanoparticle Clusters ◽  
Li Ion ◽  
Hollow Carbon ◽  
Initial Coulombic Efficiency

Clustered Si@C core–shell-structured particles are synthesized using an organic/inorganic emulsion polymerization process and utilized as a high performance anode material for Li-ion batteries with highly improved initial Coulombic efficiency.

Self-sacrificial organic lithium salt enhanced initial Coulombic efficiency for safer and greener lithium-ion batteries

2019 ◽  
Vol 55 (72) ◽  
pp. 10737-10739 ◽  
Author(s):  
Dapeng Wang ◽  
Zhian Zhang ◽  
Bo Hong ◽  
Yanqing Lai
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Salt ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Li Ion Batteries ◽  
Li Ion ◽  
Cathode Additive ◽  
Initial Coulombic Efficiency

Li2DHBA is proposed as a cathode additive that leaves no residue to compensate for first cycle Li loss in Li-ion batteries.

Physical and Electrochemical Properties of Li2-xFeSiO4/C Cathode Material for Li-Ion Batteries

2014 ◽  
Vol 644-650 ◽  
pp. 4710-4713
Author(s):  
Xiao Bing Huang ◽  
Jie Ren ◽  
Hao Wang ◽  
Pei Tian Peng ◽  
Shi Qiang Feng ◽  
...  
Keyword(s):  
Discharge Capacity ◽  
Li Ion Batteries ◽  
X Ray Diffraction ◽  
Initial Value ◽  
Solid State Method ◽  
X Ray ◽  
Specific Discharge ◽  
Li Ion ◽  
Traditional Solid State Method ◽  
Discharge Test

Li2-xFeSiO4/C (x=0.01, 0.05, 0.1) were successfully synthesized by a traditional solid-state method and systematically investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and the charge-discharge test, respectively. The results demonstrated that Li2-xFeSiO4exhibited the best electrochemical performance among the three as-synthsied samples. it delivered a specific discharge capacity of 142 mAh g-1, 112 mAh g-1at 0.2 C and 2 C, respectively. After 100 cycles at the rate of 1 C, the discharge capacity remained 95.1% of its initial value.

High-coulombic-efficiency Si-based hybrid microspheres synthesized by the combination of graphene and IL-derived carbon

2015 ◽  
Vol 3 (42) ◽  
pp. 20935-20943 ◽  
Author(s):  
Sang-Hoon Park ◽  
Dongjoon Ahn ◽  
Young-Min Choi ◽  
Kwang Chul Roh ◽  
Kwang-Bum Kim
Keyword(s):  
Energy Efficiency ◽  
Coulombic Efficiency ◽  
Li Ion Batteries ◽  
Irreversible Capacity ◽  
Full Cell ◽  
Capacity Loss ◽  
Cell Capacity ◽  
Li Ion ◽  
Initial Coulombic Efficiency ◽  
High Coulombic Efficiency

The low initial coulombic efficiency of a Si-based anode can hinder the performance of practical full-cell Li-ion batteries (LIBs), as the irreversible capacity loss of the anode can diminish the reversible full-cell capacity and the energy efficiency.

Higher Than 90% Initial Coulombic Efficiency with Staghorn‐Coral‐Like 3D Porous LiFeO 2− x as Anode Materials for Li‐Ion Batteries

2020 ◽  
Vol 32 (22) ◽  
pp. 1908285 ◽  
Author(s):  
Yaxiong Yang ◽  
Xiaolei Qu ◽  
Xin Zhang ◽  
Yongfeng Liu ◽  
Jianjiang Hu ◽  
...  
Keyword(s):  
Anode Materials ◽  
Coulombic Efficiency ◽  
Li Ion Batteries ◽  
Li Ion ◽  
Initial Coulombic Efficiency
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