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- Renault, Stéven, et al.
(författare)
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Environmentally-Friendly Lithium Recycling From a Spent Organic Li-Ion Battery
- 2014
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Ingår i: ChemSusChem. - : Wiley. - 1864-5631 .- 1864-564X. ; 7:10, s. 2859-2867
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Tidskriftsartikel (refereegranskat)abstract
- A simple and straightforward method using non-polluting solvents and a single thermal treatment step at moderate temperature was investigated as an environmentally-friendly process to recycle lithium from organic electrode materials for secondary lithium batteries. This method, highly dependent on the choice of electrolyte, gives up to 99% of sustained capacity for the recycled materials used in a second life-cycle battery when compared with the original. The best results were obtained using a dimethyl carbonate/lithium bis(trifluoromethane sulfonyl) imide electrolyte that does not decompose in presence of water. The process implies a thermal decomposition step at a moderate temperature of the extracted organic material into lithium carbonate, which is then used as a lithiation agent for the preparation of fresh electrode material without loss of lithium.
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- Renault, Stevén, et al.
(författare)
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Improving the electrochemical performance of organic Li-ion battery electrodes
- 2013
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Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1359-7345 .- 1364-548X. ; 49:19, s. 1945-1947
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Tidskriftsartikel (refereegranskat)abstract
- Dilithium benzenediacrylate was prepared and investigated as an example of a readily available organic electrode material for lithium-ion batteries. Its poor conductive properties were overcome by a method of carbon-coating in the liquid state, resulting in enhanced cycling performance, displaying a reversible capacity of 180 mA h g(-1).
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- Renault, Stéven, et al.
(författare)
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Stability of organic Na-ion battery electrode materials : The case of disodium pyromellitic diimidate
- 2014
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Ingår i: Electrochemistry communications. - : Elsevier BV. - 1388-2481 .- 1873-1902. ; 45, s. 52-55
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Tidskriftsartikel (refereegranskat)abstract
- A novel organic Na-salt is presented here for utilization as an active electrode material in rechargeable Na-ion batteries. The compound, disodium pyromellitic diimidate, is synthesized through a reaction by pyromellitic acid and sodium hydride and characterized using H-1-NMR. Na-batteries of the organic compound were able to obtain capacity values close to the theoretical during the first cycles, but a steady capacity decrease could be observed during cycling. The battery nevertheless delivered a capacity of ca 90 mAh/g after 100 cycles, rendering it a comparatively competitive organic Na-battery material. However, the results stress the importance of tailoring Na-compounds with a good chemical stability also at high levels of sodiation, since decomposition side-reactions can be probable.
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- Ruifrok, Anneloes E, et al.
(författare)
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Study protocol : Differential effects of diet and physical activity based interventions in pregnancy on maternal and fetal outcomes: Individual patient data (IPD) meta-analysis and health economic evaluation
- 2014
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Ingår i: Systematic Reviews. - : Springer Science and Business Media LLC. - 2046-4053. ; 3
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Tidskriftsartikel (refereegranskat)abstract
- BackgroundPregnant women who gain excess weight are at risk of complications during pregnancy and in the long term. Interventions based on diet and physical activity minimise gestational weight gain with varied effect on clinical outcomes. The effect of interventions on varied groups of women based on body mass index, age, ethnicity, socioeconomic status, parity, and underlying medical conditions is not clear. Our individual patient data (IPD) meta-analysis of randomised trials will assess the differential effect of diet- and physical activity-based interventions on maternal weight gain and pregnancy outcomes in clinically relevant subgroups of women.Methods/designRandomised trials on diet and physical activity in pregnancy will be identified by searching the following databases: MEDLINE, EMBASE, BIOSIS, LILACS, Pascal, Science Citation Index, Cochrane Database of Systematic Reviews, Cochrane Central Register of Controlled Trials, Database of Abstracts of Reviews of Effects, and Health Technology Assessment Database. Primary researchers of the identified trials are invited to join the International Weight Management in Pregnancy Collaborative Network and share their individual patient data. We will reanalyse each study separately and confirm the findings with the original authors. Then, for each intervention type and outcome, we will perform as appropriate either a one-step or a two-step IPD meta-analysis to obtain summary estimates of effects and 95% confidence intervals, for all women combined and for each subgroup of interest. The primary outcomes are gestational weight gain and composite adverse maternal and fetal outcomes. The difference in effects between subgroups will be estimated and between-study heterogeneity suitably quantified and explored. The potential for publication bias and availability bias in the IPD obtained will be investigated. We will conduct a model-based economic evaluation to assess the cost effectiveness of the interventions to manage weight gain in pregnancy and undertake a value of information analysis to inform future research.
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