Institution
Saft Groupe S.A.
Company•Bagnolet, France•
About: Saft Groupe S.A. is a company organization based out in Bagnolet, France. It is known for research contribution in the topics: Battery (electricity) & Lithium. The organization has 801 authors who have published 907 publications receiving 16515 citations.
Papers published on a yearly basis
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TL;DR: In this paper, the aging mechanisms occurring in Li ion batteries, either on rest or on cycling, are described from long-term storage or cycling data, and the results are an increase of cell impedance, and possible slow CO2 evolution.
979 citations
TL;DR: In this article, the long term calendar life of LiCoO 2 cells for satellite and standby applications has been studied in experiments where the capacity evolution is tracked as a function of storage temperature.
600 citations
TL;DR: Batteries go bad, Palacin and de Guibert review such failures and suggest that, although often chemistry-specific, common causes can be found, ways to enhance battery lifetime, such as through improved battery management systems, which are needed for advanced rechargeable batteries.
Abstract: Battery failure and gradual performance degradation (aging) are the result of complex interrelated phenomena that depend on battery chemistry, design, environment, and the actual operation conditions. The current available knowledge on these matters results from a vast combination of experimental and modeling approaches. We explore the state of the art with respect to materials as well as usage (temperature, charge/discharge rate, etc.) for lead-acid, nickel-cadmium, nickel-metal hydride, and lithium-ion chemistries. Battery diagnosis strategies and plausible developments related to large-scale battery applications are also discussed.
572 citations
TL;DR: In this article, a theoretical approach to design electrodes that can accommodate this large volume expansion is discussed, and experimental results agree well with the theoretical approach, showing that Si-based electrodes with a relatively low Si content (<33 wt %) and high binder content (33-56 wt ) cycle at large capacities (∼ 660 mAh/g) for hundreds of cycles.
Abstract: High-capacity Si-based electrodes could replace carbon-based electrodes in the next generation of Li-ion batteries. Although Si-based electrodes have large gravimetric capacities, they typically suffer from poor cyclability. One reason for the poor cyclability is large volume expansion associated with 3.75 mol of Li reacting with 1 mol of Si. A theoretical approach to design electrodes that can accommodate this large volume expansion is discussed. It is shown that experimental results agree well with the theoretical approach. We show that Si-based electrodes with a relatively low Si content (<33 wt %) and high binder content (33-56 wt %) cycle at large capacities (∼ 660 mAh/g) for hundreds of cycles. No special electrode processing or cycling procedures are required to achieve high capacities with good cyclability.
355 citations
TL;DR: In this article, the performance degradation of supercapacitors with time of operation, i.e., capacity decrease and resistance increase, are due to the decomposition of the organic electrolyte on the active surface of the carbon substrate, forming products which block a part of porosity.
351 citations
Authors
Showing all 801 results
| Name | H-index | Papers | Citations |
|---|---|---|---|
| Marc Davis | 99 | 412 | 50243 |
| Jacques Perichon | 43 | 318 | 5525 |
| Jean-Pierre Pereira-Ramos | 41 | 200 | 6121 |
| John R. Ward | 40 | 121 | 11858 |
| Bernard Davat | 38 | 155 | 5564 |
| Dominique Larcher | 38 | 72 | 12236 |
| Marlene J. Egger | 35 | 109 | 5377 |
| James C. Reading | 34 | 82 | 5290 |
| Stéphane Raël | 28 | 90 | 3611 |
| Hubert Razik | 27 | 138 | 2798 |
| Philippe Biensan | 23 | 57 | 2738 |
| H. James Williams | 23 | 38 | 6599 |
| Michel Broussely | 22 | 57 | 3787 |
| Serge Flandrois | 20 | 83 | 1524 |
| Cécile Tessier | 19 | 58 | 1326 |