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Song Z, Dai Y, Wang T, Yu Q, Ye X, Wang L, Zhang Y, Wang S, Luo W. An Active Halide Catholyte Boosts the Extra Capacity for All-Solid-State Batteries. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2405277. [PMID: 38877545 DOI: 10.1002/adma.202405277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2024] [Revised: 06/12/2024] [Indexed: 06/16/2024]
Abstract
Replacing flammable organic liquid electrolytes with nonflammable solid electrolytes (SEs) in lithium batteries is crucial for enhancing safety across various applications, including portable electronics, electric vehicles, and scalable energy storage. Since typical cathode materials do not possess superionic conductivity, Li-ion conduction in the cathode predominantly relies on incorporating a significant number of SEs as additives to form a composite cathode, which substantially compromises the energy density of solid-state lithium batteries. Here, a halide SE, Li3VCl6 is demonstrated, which not only exhibits a decent Li+ conductivity, but more importantly, delivers a highly reversible capacity of approximately 80 mAh g-1 with an average voltage of 3 V versus Li+/Li. The ionic conductivity of Li3VCl6 experiences marginal fluctuations upon electrochemical lithiation/delithiation, as its prototypical solid-solution reaction results solely in a reduction of lithium vacancy. When combined with the traditional LiFePO4 cathode, the active Li3VCl6 catholyte enables an impressive capacity of 217.1 mAh g-1 LFP and about 50% increase in energy density compared with inactive catholytes. Harnessing the integrated mass of the catholyte-which can serve as an active material-presents an opportunity to boost the extra capacity, rendering it feasible in applications.
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Affiliation(s)
- Zhenyou Song
- Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Yiming Dai
- Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Tengrui Wang
- Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Qian Yu
- Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Xiaolu Ye
- Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Likuo Wang
- Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Yini Zhang
- Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Suntongxing Wang
- Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Wei Luo
- Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
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Wang X, Yin L, Ronne A, Zhang Y, Hu Z, Tan S, Wang Q, Song B, Li M, Rong X, Lapidus S, Yang S, Hu E, Liu J. Stabilizing lattice oxygen redox in layered sodium transition metal oxide through spin singlet state. Nat Commun 2023; 14:7665. [PMID: 37996427 PMCID: PMC10667238 DOI: 10.1038/s41467-023-43031-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Accepted: 10/27/2023] [Indexed: 11/25/2023] Open
Abstract
Reversible lattice oxygen redox reactions offer the potential to enhance energy density and lower battery cathode costs. However, their widespread adoption faces obstacles like substantial voltage hysteresis and poor stability. The current research addresses these challenges by achieving a non-hysteresis, long-term stable oxygen redox reaction in the P3-type Na2/3Cu1/3Mn2/3O2. Here we show this is accomplished by forming spin singlet states during charge and discharge. Detailed analysis, including in-situ X-ray diffraction, shows highly reversible structural changes during cycling. In addition, local CuO6 Jahn-Teller distortions persist throughout, with dynamic Cu-O bond length variations. In-situ hard X-ray absorption and ex-situ soft X-ray absorption study, along with density function theory calculations, reveal two distinct charge compensation mechanisms at approximately 3.66 V and 3.99 V plateaus. Notably, we observe a Zhang-Rice-like singlet state during 3.99 V charging, offering an alternative charge compensation mechanism to stabilize the active oxygen redox reaction.
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Affiliation(s)
- Xuelong Wang
- Chemistry Division, Brookhaven National Laboratory, Upton, NY, 11973, USA
- Institute of Physics, Chinese Academy of Sciences, 100190, Beijing, China
| | - Liang Yin
- Institute of Physics, Chinese Academy of Sciences, 100190, Beijing, China
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Arthur Ronne
- Chemistry Division, Brookhaven National Laboratory, Upton, NY, 11973, USA
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA
| | - Yiman Zhang
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Zilin Hu
- Institute of Physics, Chinese Academy of Sciences, 100190, Beijing, China
| | - Sha Tan
- Chemistry Division, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Qinchao Wang
- Chemistry Division, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Bohang Song
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37922, USA
| | - Mengya Li
- Electrification and Energy Infrastructure Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37922, USA
| | - Xiaohui Rong
- Institute of Physics, Chinese Academy of Sciences, 100190, Beijing, China
| | - Saul Lapidus
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Shize Yang
- Energy Sciences Institute, Yale University, 810 West Campus Drive, West Haven, CT, 06516, USA
| | - Enyuan Hu
- Chemistry Division, Brookhaven National Laboratory, Upton, NY, 11973, USA.
| | - Jue Liu
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37922, USA.
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Liu X, Tong S, Zhang X, Jia M, Yan X. Advanced material characterization techniques for sodium‐ion battery. ASIA-PAC J CHEM ENG 2022. [DOI: 10.1002/apj.2800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Xiangyu Liu
- College of Materials Science and Engineering Jiangsu University Zhenjiang China
| | - Shuai Tong
- College of Materials Science and Engineering Jiangsu University Zhenjiang China
| | - Xiaoyu Zhang
- College of Materials Science and Engineering Jiangsu University Zhenjiang China
| | - Min Jia
- College of Materials Science and Engineering Jiangsu University Zhenjiang China
| | - Xiaohong Yan
- College of Materials Science and Engineering Jiangsu University Zhenjiang China
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