Mengshan Xu, Mei Zhao, Min Hong, Mengting Zheng, Jianwei Nai, Xinyong Tao, Tiefeng Liu
{"title":"Upcycling of Air-Degraded Ni-Rich Cathodes via In Situ Surface Reconstruction","authors":"Mengshan Xu, Mei Zhao, Min Hong, Mengting Zheng, Jianwei Nai, Xinyong Tao, Tiefeng Liu","doi":"10.1021/acsenergylett.5c00581","DOIUrl":"https://doi.org/10.1021/acsenergylett.5c00581","url":null,"abstract":"Ni-rich cathodes are well-known for their high specific capacity but require extremely dry conditions for prolonged storage due to their inherent sensitivity to tiny amounts of moisture in the atmosphere. Once LiOH/Li<sub>2</sub>CO<sub>3</sub> is formed from exposure to moisture on the cathode surface, these impurities unavoidably obstruct Li insertion into/extraction out of bulk electrodes and simultaneously cause a further loss of the active Li source. In this work, we propose to convert the LiOH/Li<sub>2</sub>CO<sub>3</sub> layer on spent NCM82 particles (S-NCM82) into a high-kinetic Li<sub>3</sub>PO<sub>4</sub>/LiF interphase via a simple phosphide reaction in aqueous LiPO<sub>2</sub>F<sub>2</sub> solution. Meanwhile, such a conformal interphase prevents side reactions with electrolytes and alleviates structural strain during the service. The regenerated NCM82 electrode (R-NCM82) demonstrates a high specific capacity of 102 mAh/g at 5C, surpassing the 79 mAh/g observed in the pristine NCM82 (P-NCM82). Additionally, the R-NCM82//Gr full-cell exhibits 76% of its initial capacity after 300 cycles at 1C. This conversion process is easily scalable and could inspire the development of upcycling techniques for regenerating various spent electrodes.","PeriodicalId":16,"journal":{"name":"ACS Energy Letters ","volume":"25 1","pages":""},"PeriodicalIF":22.0,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144278766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Simon Rufer, Tal Joseph, Zara Aamer and Kripa K. Varanasi*,
{"title":"","authors":"Simon Rufer, Tal Joseph, Zara Aamer and Kripa K. Varanasi*, ","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":16,"journal":{"name":"ACS Energy Letters ","volume":"10 6","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":19.3,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsenergylett.5c00893","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144424963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Photoelectrochemical Solar Fuels: What’s Next?","authors":"Kevin Sivula","doi":"10.1021/acsenergylett.5c01404","DOIUrl":"https://doi.org/10.1021/acsenergylett.5c01404","url":null,"abstract":"Figure 1. Abstract illustration of a PEC cell. Text-to-image generation from Microsoft Bing image creator was used, in part, to create this image. Figure 2. Simplified schematics of some typical semiconductor electrode architectures: (a) classic n-type semiconductor photoanode, (b) cocatalyst decorated photoanode, (c) a protected photoelectrode with a wide band gap semiconductor overlayer, and (d) a heterojunction photoanode. Electrode structures with continuous metal overlayers (with a work function Φ<sub>M</sub> that controls the band bending/photopotential in the semiconductor) are also shown: (e) Schottky junction-biased electrode and (f) PV-biased electrode. This article references 14 other publications. Early View Article. This article has not yet been cited by other publications.","PeriodicalId":16,"journal":{"name":"ACS Energy Letters ","volume":"27 1","pages":""},"PeriodicalIF":22.0,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144278772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}