{"title":"From Spent Lithium-Ion Batteries to High-Performance Supercapacitors: Enabling Universal Gradient Recycling via Spin Capacitance","authors":"Shuxuan Liao, Lihao Qin, Yize Niu, Mingming Xie, Rui Liu, Zeyuan Bu, Haoyu Fu, Xianyi Meng, Weiye Zhang, Guopeng Liu, Yuxiang Hu, Qiang Li","doi":"10.1002/aenm.202403970","DOIUrl":null,"url":null,"abstract":"Driven by environmental imperatives and the growing economic challenges posed by the accumulation of spent batteries, developing effective recycling strategies has become paramount. Current direct battery recycling methodologies primarily focus on structural restoration, but the universality of this approach is hampered by the variability in electrode degradation mechanisms and the extent of irreversible damage sustained after cycling. To overcome these inherent limitations, this research introduces a universally applicable in situ recycling strategy that rejuvenates the metal components within batteries. Through an in situ facile electrochemical treatment, the cathode material is engineered to create a nanostructured interface composed of transition metal/lithium compounds, enhancing intrinsic electron/ion conduction and enabling substantial charge storage with accelerated transfer capabilities. Furthermore, operando magnetometry reveals that the energy storage mechanism aligns with a space charge mechanism, manifesting as spin-polarized capacitance. As proof of concept, the recycled LiFePO<sub>4</sub>-based batteries are in situ converted into high-performance supercapacitors, boasting an energy density of 106 Wh kg<sup>−1</sup> and a power density of 10,714 W kg<sup>−1</sup>, alongside impressive cycling stability with 91.3% capacitance retention after 2000 cycles. This approach demonstrates feasibility with LiFePO<sub>4</sub> and extends to other commercial cathodes such as LiCoO<sub>2</sub>, LiNi<sub>1/3</sub>Co<sub>1/3</sub>Mn<sub>1/3</sub>O<sub>2</sub>, and even their blends, offering a groundbreaking solution for lithium-ion battery recycling.","PeriodicalId":111,"journal":{"name":"Advanced Energy Materials","volume":"13 1","pages":""},"PeriodicalIF":24.4000,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Energy Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1002/aenm.202403970","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Driven by environmental imperatives and the growing economic challenges posed by the accumulation of spent batteries, developing effective recycling strategies has become paramount. Current direct battery recycling methodologies primarily focus on structural restoration, but the universality of this approach is hampered by the variability in electrode degradation mechanisms and the extent of irreversible damage sustained after cycling. To overcome these inherent limitations, this research introduces a universally applicable in situ recycling strategy that rejuvenates the metal components within batteries. Through an in situ facile electrochemical treatment, the cathode material is engineered to create a nanostructured interface composed of transition metal/lithium compounds, enhancing intrinsic electron/ion conduction and enabling substantial charge storage with accelerated transfer capabilities. Furthermore, operando magnetometry reveals that the energy storage mechanism aligns with a space charge mechanism, manifesting as spin-polarized capacitance. As proof of concept, the recycled LiFePO4-based batteries are in situ converted into high-performance supercapacitors, boasting an energy density of 106 Wh kg−1 and a power density of 10,714 W kg−1, alongside impressive cycling stability with 91.3% capacitance retention after 2000 cycles. This approach demonstrates feasibility with LiFePO4 and extends to other commercial cathodes such as LiCoO2, LiNi1/3Co1/3Mn1/3O2, and even their blends, offering a groundbreaking solution for lithium-ion battery recycling.
期刊介绍:
Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small.
With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics.
The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.