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Chen PP, Zhang BH, Li ZA, Lei JT, Chen JZ, Hou YL, Zhao DL. Regulate the Solvation Structure and Interface by Nitrate in Phosphate-Based Electrolytes for 4.5 V-Class Ni-Rich Batteries. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2403079. [PMID: 38829022 DOI: 10.1002/smll.202403079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 05/26/2024] [Indexed: 06/05/2024]
Abstract
Phosphate-based electrolyte propels the advanced battery system with high safety. Unfortunately, restricted by poor electrochemical stability, it is difficult to be compatible with advanced lithium metal anodes and Ni-rich cathodes. To alleviate these issues, the study has developed a phosphate-based localized high-concentration electrolyte with a nitrate-driven solvation structure, and the nitrate-derived N-rich inorganic interface shows excellent performance in stabilizing the LiNi0.8Co0.1Mn0.1O2 (NCM811) cathode interface and modulating the lithium deposition morphology on the anode. The results show that the Li|| NCM811 cell has exceptional long-cycle stability of >80% capacity retention after 800 cycles at 4.3 V, 1 C. A more prominent capacity retention rate of 93.3% after 200 cycles can be reached with the high voltage of 4.5 V. While being compatible with the phosphate-based electrolyte with good flame retardancy and the good electrochemical stability of Ni-rich lithium metal battery (LMBs) systems, the present work expands the construction of anion-rich solvation structures, which is expected to promote the development of the high-performance LMBs with safety.
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Affiliation(s)
- Pei-Pei Chen
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
- Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology), Ministry of Education, Beijing, 100029, P. R. China
| | - Bo-Han Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
- Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology), Ministry of Education, Beijing, 100029, P. R. China
| | - Zi-Ang Li
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
- Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology), Ministry of Education, Beijing, 100029, P. R. China
| | - Jia-Ting Lei
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
- Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology), Ministry of Education, Beijing, 100029, P. R. China
| | - Jing-Zhou Chen
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
- Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology), Ministry of Education, Beijing, 100029, P. R. China
| | - Yun-Lei Hou
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
- Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology), Ministry of Education, Beijing, 100029, P. R. China
| | - Dong-Lin Zhao
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
- Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology), Ministry of Education, Beijing, 100029, P. R. China
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Zahova S, Tuleshkov P, Troev K, Mitova V. Value-Added Products Derived from Poly(ethylene terephthalate) Glycolysis. Molecules 2024; 29:4261. [PMID: 39275109 PMCID: PMC11397719 DOI: 10.3390/molecules29174261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2024] [Revised: 08/31/2024] [Accepted: 09/03/2024] [Indexed: 09/16/2024] Open
Abstract
Among polymer wastes, poly(ethylene terephthalate) (PET) is the most important commercial thermoplastic polyester. Less than 30% of total PET production is recycled into new products. Therefore, large amounts of waste PET need to be recycled. We describe a feasible approach for the direct application of the glycolysis products of PET (GP-PET), without further purification, for the synthesis of value-added products. It was established that GP-PET is valorized via phosphorylation with phenylphosphonic dichloride (PPD), as well as with trimethyl phosphate (TMP). When PPD is used, a condensation reaction takes place with the evolution of hydrogen chloride. During the interaction between GP-PET and TMP, the following reactions take place simultaneously: a transesterification with the participation of the hydroxyl group of GP-PET and the methoxy group of TMP and an exchange reaction between the ester group of GP-PET and the methyl ester group of TMP. The occurrence of the exchange reaction was confirmed by 1H, 31P, 13C NMR, and GPC analysis. Thermogravimetric analysis (TGA) revealed that the percentage of a carbon residual (CR) implies the possibility of using the end products as flame retardant (FR) additives, especially for polyurethanes as well as thermal stabilizers of polymer materials or Li-ion cells.
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Affiliation(s)
- Simona Zahova
- Institute of Polymers, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
| | - Pencho Tuleshkov
- Institute of Polymers, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
| | - Kolio Troev
- Institute of Polymers, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
| | - Violeta Mitova
- Institute of Polymers, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
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Yan X, Huang W, Zhu C, Zhao YJ. Insights from Ab Initio Molecular Dynamics on the Interface Reaction between Electrolyte and Li 2MnO 3 Cathode during the Charging Process. ACS APPLIED MATERIALS & INTERFACES 2024; 16:44979-44987. [PMID: 39140380 DOI: 10.1021/acsami.4c10466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/15/2024]
Abstract
The complex interface reactions are crucial to the performance of the Li2MnO3 cathode material. Here, the interface reactions between the liquid electrolyte and the typical surfaces of Li2MnO3 during the charging process are systematically investigated by ab initio molecular dynamics (AIMD) simulation and first-principles calculation. The results indicate that these interface reactions lead to the formation of hydroxide radicals, oxygen, carbon dioxide, carbonate radicals, and other products, which are consistent with the experimental findings. These processes primarily result from the conversion of the stable closed-shell O2- into reactive oxygen ions by electron loss. All surfaces exhibit some degree of layered- and spinel-like phase transitions during the AIMD simulations, consistent with the experiment. This is mainly attributed to the decrease in the Mn-O bond strength and the increase in the Li/O ion vacancy concentration. This study offers valuable theoretical insights into the interface reaction between lithium-rich cathode materials and liquid electrolytes.
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Affiliation(s)
- Xiaotong Yan
- Department of Physics, South China University of Technology, Guangzhou 510641, China
| | - Weijie Huang
- Department of Physics, South China University of Technology, Guangzhou 510641, China
| | - Chunwei Zhu
- Department of Physics, South China University of Technology, Guangzhou 510641, China
| | - Yu-Jun Zhao
- Department of Physics, South China University of Technology, Guangzhou 510641, China
- Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of Technology, Guangzhou 510641, China
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Gong Y, Li X, Zeng L, Huang Y, Qiu B, Liu Z. Tuning Local Structural Configurations to Improve Oxygen-Redox Reversibility of Li-Rich Layered Oxides. J Phys Chem Lett 2023; 14:4575-4582. [PMID: 37162124 DOI: 10.1021/acs.jpclett.3c00616] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Li-rich layered oxides (LLOs) are regarded as one of the most desirable cathode materials due to their high specific capacity. Nevertheless, the irreversible oxygen release associated with low oxygen stability prevents their widespread application. Herein, an improved oxygen redox reversibility was achieved by constructing Ni2+-O2--Ni2+ configurations. Superconducting Quantum Interference Device (SQUID) magnetometry measurements are used to track the evolution of the Ni2+-O2--Ni2+ configuration during the electrochemical process. The strongest 180° superexchange interaction in the Ni2+-O2--Ni2+ configuration, derived from the inevitable Li/Ni mixing in LLOs, regulates the local structure to form the ferrimagnetic (FiM) structural units. Consequently, the FiM structural units prevent the irreversible oxygen release and endow LLOs with high initial Coulombic efficiency (ICE). This work emphasizes the importance of the Ni2+-O2--Ni2+ configuration for LLOs with high reversible capacity and proposes a synthesis approach to modulate the amount of FiM structural units.
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Affiliation(s)
- Yan Gong
- Ningbo Institute of Materials Technology & Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, P. R. China
- College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences (UCAS), Beijing 100049, P. R. China
| | - Xiao Li
- Ningbo Institute of Materials Technology & Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, P. R. China
- College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences (UCAS), Beijing 100049, P. R. China
| | - Lingcai Zeng
- Ningbo Institute of Materials Technology & Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, P. R. China
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, P. R. China
| | - Yuanfei Huang
- Ningbo Institute of Materials Technology & Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, P. R. China
- College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences (UCAS), Beijing 100049, P. R. China
| | - Bao Qiu
- Ningbo Institute of Materials Technology & Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, P. R. China
- College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences (UCAS), Beijing 100049, P. R. China
| | - Zhaoping Liu
- Ningbo Institute of Materials Technology & Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, P. R. China
- College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences (UCAS), Beijing 100049, P. R. China
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