Chemical Preinsertion of Lithium: An Approach to Improve the Intrinsic Capacity Retention of Bulk Si Anodes for Li-ion Batteries

2012 ◽  
Vol 3 (23) ◽  
pp. 3555-3558 ◽  
Author(s):  
Ruijun Ma ◽  
Yongfeng Liu ◽  
Yanping He ◽  
Mingxia Gao ◽  
Hongge Pan
Keyword(s):  
Li Ion Batteries ◽  
Capacity Retention ◽  
Intrinsic Capacity ◽  
Li Ion ◽  
Si Anodes

SEI layer and impact on Si-anodes for Li-ion batteries

2022 ◽  
pp. 183-263
Author(s):  
Partha Saha ◽  
Tandra Rani Mohanta ◽  
Abhishek Kumar
Keyword(s):  
Li Ion Batteries ◽  
Sei Layer ◽  
Li Ion ◽  
Si Anodes

scholarly journals Ni–Sn intermetallics as an efficient buffering matrix of Si anodes in Li-ion batteries

2020 ◽  
Vol 8 (35) ◽  
pp. 18132-18142 ◽  
Author(s):  
Tahar Azib ◽  
Nicolas Bibent ◽  
Michel Latroche ◽  
Florent Fischer ◽  
Jean-Claude Jumas ◽  
...  
Keyword(s):  
Silicon Nanoparticles ◽  
Coulombic Efficiency ◽  
High Capacity ◽  
Cycle Life ◽  
Li Ion Batteries ◽  
Long Cycle ◽  
Long Cycle Life ◽  
Intermetallic Matrix ◽  
Li Ion ◽  
Si Anodes

High-capacity Si-based anodes with good coulombic efficiency and long-cycle life are achieved by embedding silicon nanoparticles in dual Ni3Sn4/Ni3Sn2 active/inactive intermetallic matrix.

Spherical graphite produced from waste semi-coke with enhanced properties as an anode material for Li-ion batteries

2019 ◽  
Vol 3 (11) ◽  
pp. 3116-3127 ◽  
Author(s):  
Ming Shi ◽  
Zige Tai ◽  
Na Li ◽  
Kunyang Zou ◽  
Yuanzhen Chen ◽  
...  
Keyword(s):  
Anode Material ◽  
Cycle Life ◽  
Li Ion Batteries ◽  
Capacity Retention ◽  
Spherical Graphite ◽  
Li Ion ◽  
Enhanced Properties

Spherical graphite produced from waste semi-coke displays an excellent cycle life with the capacity retention of 97.7% at 0.5C after 700 cycles.

scholarly journals Stabilizing Li-rich NMC Materials by Using Precursor Salts with Acetate and Nitrate Anions for Li-ion Batteries

Batteries ◽  
2019 ◽  
Vol 5 (4) ◽  
pp. 69 ◽  
Author(s):  
Khaleel I. Hamad ◽  
Yangchuan Xing
Keyword(s):  
Particle Size ◽  
Lithium Ion ◽  
Metal Salts ◽  
Gelling Agent ◽  
Li Ion Batteries ◽  
Spectroscopy Analysis ◽  
Capacity Retention ◽  
Li Ion ◽  
The Fourier Transform ◽  
Nitrate Anions

Lithium-rich layered oxide cathode materials of Li1.2Mn0.5100Ni0.2175Co0.0725O2 have been synthesized using metal salts with acetate and nitrate anions as precursors in glycerol solvent. The effects of the precursor metal salts on particle size, morphology, cationic ordering, and ultimately, the electrode performance of the cathode powders have been studied. It was demonstrated that the use of cornstarch as a gelling agent with nitrate-based metal salts results in a reduction of particle size, leading to higher surface area and initial discharge capacity. However, the cornstarch gelling effect was minimized when acetate salts were used. As observed in the Fourier-transform infrared spectroscopy analysis, cornstarch can react with acetates to form acetyl groups during the synthesis, effectively preventing the cornstarch gel from capping the particles, thus leading to larger particles. A tradeoff was found when nitrate and acetate salts were mixed in the synthesis. It was shown that the new cathode powder has the best cationic ordering and capacity retention, promising a much stable Li-rich cathode material for lithium-ion batteries.

Electrochemical Behavior of LiCo(1-x)MnxO2 Crystalline Powders

2014 ◽  
Vol 895 ◽  
pp. 334-337
Author(s):  
Azira Azahidi ◽  
Norlida Kamarulzaman ◽  
Kelimah Elong ◽  
Nurhanna Badar ◽  
Nurul Atikah Mohd Mokhtar
Keyword(s):  
Partial Substitution ◽  
Li Ion Batteries ◽  
X Ray Diffraction ◽  
Capacity Retention ◽  
X Ray ◽  
Capacity Loss ◽  
Transition Metal Element ◽  
Metal Element ◽  
Li Ion ◽  
Mn Doped

LiCoO2 is a well-known cathode material used in commercial Li-ion batteries but it has its own limitations in terms of cost and toxicity. Improvement of the material by partial substitution of Co with other transition metals is one of the alternative and effective ways to overcome the limitations and improve the electrochemical performance of cathode materials. The transition metal element used for the substitution has to be cheaper and non-toxic thus Mn is chosen here. LiCo(1-x)MnxO2 (x= 0.1, 0.2, 0.3) we synthesized by a novel route using a self-propagating combustion (SPC) method. The samples are analyzed using X-Ray Diffraction (XRD) for phase purity and Field Emission Scanning Electron Microscopy (FESEM) for morphology and particle size studies. The materials obtained are phase pure. In terms of electrochemical activity, though it does not show better first cycle discharge capacity, the Mn doped materials have improved capacity retention. Results showed that LiCo0.9Mn0.1O2 and LiCo0.8Mn0.2O2 exhibited less than 8 % capacity loss in the 20th cycle compared to 12 % for LiCoO2.

scholarly journals Batteries: Nanoscale Heterogeneity of Multilayered Si Anodes with Embedded Nanoparticle Scaffolds for Li-Ion Batteries (Adv. Sci. 10/2017)

2017 ◽  
Vol 4 (10) ◽  
Author(s):  
Marta Haro ◽  
Vidyadhar Singh ◽  
Stephan Steinhauer ◽  
Evropi Toulkeridou ◽  
Panagiotis Grammatikopoulos ◽  
...  
Keyword(s):  
Li Ion Batteries ◽  
Li Ion ◽  
Si Anodes

scholarly journals Electrochemical Performance and Thermal Stability of Iron Oxyfluoride (FeOF) for Sodium-Ion Batteries

Batteries ◽  
2018 ◽  
Vol 4 (4) ◽  
pp. 68
Author(s):  
Ayuko Kitajou ◽  
Liwei Zhao ◽  
Rintaro Nagano ◽  
Atsushi Inoishi ◽  
Eiji Kobayashi ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Cathode Material ◽  
Li Ion Batteries ◽  
Scanning Calorimetry ◽  
Capacity Retention ◽  
Voltage Range ◽  
Initial Discharge ◽  
Toxic Risk ◽  
Li Ion ◽  
Thermal Stability Of

Self-synthesized rutile iron oxyfluoride (FeOF) was studied as a cathode material for Na-ion batteries. The highly crystalline FeOF provided an initial discharge capacity of 246 mAh g−1 in a voltage range of 1.0–4.0 V, followed by 88% of capacity retention after 20 cycles. This discharge-charge reaction of FeOF between 0.8 and 4.0 V are advanced by the Fe2+/Fe3+ redox reaction. That is, no conversion reaction was involved in the application of FeOF as a cathode material for Na-ion batteries because of the low potential of Na-insertion. In addition, the structure change of FeOF from rutile to cubic during Na ion insertion, which was similar to that in Li-ion batteries. No remarkable HF release was detected even up to 700 °C, indicating a low toxic risk of the FeOF cathode. The thermal properties of sodiated and desodiated FeOF electrodes in the associated electrolyte were investigated by DSC (Differential scanning calorimetry) up to 500 °C. Sodiated FeOF electrodes showed larger exothermic heat generation than desodiated ones, especially at a temperature higher than 380 °C. Finally, the thermal stability of FeOF cathodes in the associated Li- and Na-ion battery electrolytes was quantitatively compared with variations of the electrode/electrolyte ratio.

scholarly journals Inside Cover: Challenges in Accommodating Volume Change of Si Anodes for Li-Ion Batteries (ChemElectroChem 11/2015)

2015 ◽  
Vol 2 (11) ◽  
pp. 1626-1626
Author(s):  
Minseong Ko ◽  
Sujong Chae ◽  
Jaephil Cho
Keyword(s):  
Volume Change ◽  
Li Ion Batteries ◽  
Li Ion ◽  
Si Anodes
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