Synthesis and Characterization of Empty Silicon Clathrates for Anode Applications in Li-ion Batteries

MRS Advances ◽  
2016 ◽  
Vol 1 (45) ◽  
pp. 3043-3048 ◽  
Author(s):  
Kwai S. Chan ◽  
Michael A. Miller ◽  
Carol Ellis-Terrell ◽  
Candace K. Chan
Keyword(s):  
Coulombic Efficiency ◽  
Synthesis Method ◽  
Li Ion Batteries ◽  
Solution Synthesis ◽  
Silicon Clathrates ◽  
Potential Applications ◽  
Li Ion ◽  
Lower Capacity

ABSTRACTSeveral processing methods were developed and evaluated for synthesizing empty silicon clathrates. A solution synthesis method based on the Hofmann-elimination oxidation reaction was successfully utilized to produce 20 mg of empty Si46. Half-cells using the Si46 electrodes were successfully cycled for 1000 cycles at rate of 5.3C. The capacity of the Si46 electrode in long-term tests was 675 mAh/g at the 4th cycle, but increased to 809 mAh/g at 50 cycles. The corresponding Coulombic efficiency was better than 99%. The capacity dropped from 809 to 553 mAh/g after 1000 cycles while maintaining a 99% Coulombic efficiency. In comparison, a Ba8Al8Si38 electrode could be cycled for about 200 cycles with a lower capacity and Coulombic efficiency. Potential applications of empty silicon clathrates as anode materials in Li-ion batteries are discussed.

scholarly journals Correction to: Electrochemical Impedance Spectroscopy Characterization of Silicon-Based Electrodes for Li-Ion Batteries

2020 ◽  
Vol 11 (3) ◽  
pp. 364-364
Author(s):  
Maciej Ratynski ◽  
Bartosz Hamankiewicz ◽  
Michał Krajewski ◽  
Maciej Boczar ◽  
Dominika A. Buchberger ◽  
...  
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
Li Ion Batteries ◽  
Li Ion ◽  
Silicon Based

Electrochemical Fabrication and Characterization of Silicon Microwire Anodes for Li Ion Batteries

2015 ◽  
Vol 163 (3) ◽  
pp. A373-A379 ◽  
Author(s):  
Sandra Nöhren ◽  
Enrique Quiroga-González ◽  
Jürgen Carstensen ◽  
Helmut Föll
Keyword(s):  
Li Ion Batteries ◽  
Li Ion ◽  
Silicon Microwire ◽  
Fabrication And Characterization ◽  
Electrochemical Fabrication

scholarly journals Carbon-Coated SiO2 Composites as Promising Anode Material for Li-Ion Batteries

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4531
Author(s):  
Mihaela-Ramona Buga ◽  
Adnana Alina Spinu-Zaulet ◽  
Cosmin Giorgian Ungureanu ◽  
Raul-Augustin Mitran ◽  
Eugeniu Vasile ◽  
...  
Keyword(s):  
Anode Material ◽  
Photoelectron Spectroscopy ◽  
Coulombic Efficiency ◽  
Cycling Stability ◽  
Li Ion Batteries ◽  
Transfer Resistance ◽  
Promising Alternative ◽  
X Ray ◽  
Carbon Coated ◽  
Li Ion

Porous silica-based materials are a promising alternative to graphite anodes for Li-ion batteries due to their high theoretical capacity, low discharge potential similar to pure silicon, superior cycling stability compared to silicon, abundance, and environmental friendliness. However, several challenges prevent the practical application of silica anodes, such as low coulombic efficiency and irreversible capacity losses during cycling. The main strategy to tackle the challenges of silica as an anode material has been developed to prepare carbon-coated SiO2 composites by carbonization in argon atmosphere. A facile and eco-friendly method of preparing carbon-coated SiO2 composites using sucrose is reported herein. The carbon-coated SiO2 composites were characterized using X-ray diffraction, X-ray photoelectron spectroscopy, thermogravimetry, transmission and scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy, cyclic voltammetry, and charge–discharge cycling. A C/SiO2-0.085 M calendered electrode displays the best cycling stability, capacity of 714.3 mAh·g−1, and coulombic efficiency as well as the lowest charge transfer resistance over 200 cycles without electrode degradation. The electrochemical performance improvement could be attributed to the positive effect of the carbon thin layer that can effectively diminish interfacial impedance.

Silicon oxycarbide ceramics as anodes for lithium ion batteries: influence of carbon content on lithium storage capacity

RSC Advances ◽  
2016 ◽  
Vol 6 (106) ◽  
pp. 104597-104607 ◽  
Author(s):  
Monika Wilamowska-Zawlocka ◽  
Paweł Puczkarski ◽  
Zofia Grabowska ◽  
Jan Kaspar ◽  
Magdalena Graczyk-Zajac ◽  
...  
Keyword(s):  
Carbon Content ◽  
Lithium Ion Batteries ◽  
Storage Capacity ◽  
Lithium Ion ◽  
Silicon Oxycarbide ◽  
Synthesis And Characterization ◽  
Li Ion Batteries ◽  
Lithium Storage ◽  
Li Ion

We report here on the synthesis and characterization of silicon oxycarbide (SiOC) in view of its application as a potential anode material for Li-ion batteries.

Improved electrochemical performance of LiCoO2 electrodes for high-voltage operations by Ag thin film coating via magnetron sputtering

MRS Advances ◽  
2018 ◽  
Vol 3 (60) ◽  
pp. 3513-3518 ◽  
Author(s):  
Taner Zerrin ◽  
Mihri Ozkan ◽  
Cengiz S. Ozkan
Keyword(s):  
Thin Film ◽  
Magnetron Sputtering ◽  
Electrochemical Performance ◽  
High Voltage ◽  
Coulombic Efficiency ◽  
High Capacity ◽  
Interface Layer ◽  
Li Ion Batteries ◽  
Electrode Structure ◽  
Li Ion

ABSTRACTIncreasing the operation voltage of LiCoO2 (LCO) is a direct way to enhance the energy density of the Li-ion batteries. However, at high voltages, the cycling stability degrades very fast due to the irreversible changes in the electrode structure, and formation of an unstable solid electrolyte interface layer. In this work, Ag thin film was prepared on commercial LCO cathode by using magnetron sputtering technique. Ag coated electrode enabled an improved electrochemical performance with a better cycling capability. After 100 cycles, Ag coated LCO delivers a discharge capacity of 106.3 mAh g-1 within 3 - 4.5 V at C/5, which is increased by 45 % compared to that of the uncoated LCO. Coating the electrode surface with Ag thin film also delivered an improved Coulombic efficiency, which is believed to be an indication of suppressed parasitic reactions at the electrode interface. This work may lead to new methods on surface modifications of LCO and other cathode materials to achieve high-capacity Li-ion batteries for high-voltage operations.

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