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Gao X, Zeng X, Hu H, Li H, He X, Fan W, Fan C, Yang T, Ma Z, Nan J. A Functional Electrolyte Containing P-Phenyl Diisothiocyanate (PDITC) Additive Achieves the Interphase Stability of High Nickel Cathode in a Wide Temperature Range. Chemistry 2024; 30:e202303632. [PMID: 38150289 DOI: 10.1002/chem.202303632] [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: 11/02/2023] [Revised: 12/25/2023] [Accepted: 12/27/2023] [Indexed: 12/28/2023]
Abstract
The lithium-ion batteries (LIBs) with high nickel cathode have high specific energy, but as the nickel content in the cathode active material increases, batteries are suffering from temperature limitations, unstable performance, and transition metal dissolution during long cycling. In this work, a functional electrolyte with P-phenyl diisothiocyanate (PDITC) additive is developed to stabilize the performance of LiNi0.8 Co0.1 Mn0.1 O2 (NCM811)/graphite LIBs over a wide temperature range. Compared to the batteries without the additive, the capacity retention of the batteries with PDITC-containing electrolyte increases from 23 % to 74 % after 1400 cycles at 25 °C, and from 15 % to 85 % after 300 cycles at 45 °C. After being stored at 60 °C, the capacity retention rate and capacity recovery rate of the battery are also improved. In addition, the PDITC-containing battery has a higher discharge capacity at -20 °C, and the capacity retention rate increases from 79 % to 90 % after 500 cycles at 0 °C. Both theoretical calculations and spectroscopic results demonstrate that PDITC is involved in constructing a dense interphase, inhibiting the decomposition of the electrolyte and reducing the interfacial impedance. The application of PDITC provides a new strategy to improve the wide-temperature performance of the NCM811/graphite LIBs.
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Affiliation(s)
- Xiang Gao
- School of Chemistry, South China Normal University, Guangzhou, Guangdong, 510006
| | - Xueyi Zeng
- School of Chemistry, South China Normal University, Guangzhou, Guangdong, 510006
| | - Huilin Hu
- School of Chemistry, South China Normal University, Guangzhou, Guangdong, 510006
| | - Haijia Li
- School of Chemistry, South China Normal University, Guangzhou, Guangdong, 510006
| | - Xin He
- School of Chemistry, South China Normal University, Guangzhou, Guangdong, 510006
| | - Weizhen Fan
- School of Chemistry, South China Normal University, Guangzhou, Guangdong, 510006
- Guangzhou Tinci Materials Technology Co., Ltd., Guangzhou, Guangdong, 510760
| | - Chaojun Fan
- Guangzhou Tinci Materials Technology Co., Ltd., Guangzhou, Guangdong, 510760
| | - Tianxiang Yang
- School of Environmental Engineering and Chemistry, Luoyang Institute of Science and Technology, Luoyang, Henan, 471023
| | - Zhen Ma
- School of Chemistry, South China Normal University, Guangzhou, Guangdong, 510006
| | - Junmin Nan
- School of Chemistry, South China Normal University, Guangzhou, Guangdong, 510006
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Jiang Y, Lu S, Jiang J, Li M, Liao Y, Xu Y, Huang S, Zhao B, Zhang J. Optimized Solid Electrolyte Interphase and Solvation Structure of Potassium Ions in Carbonate Electrolytes for High-Performance Potassium Metal Batteries. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023:e2300411. [PMID: 37029576 DOI: 10.1002/smll.202300411] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Revised: 03/06/2023] [Indexed: 06/19/2023]
Abstract
The introduction of electrolyte additives is one of the most potential strategies to improve the performance of potassium metal batteries (PMBs). However, designing an additive that can alter the K+ solvation shell and essentially inhibit K dendrite remains a challenge. Herein, the amyl-triphenyl-phosphonium bromide was introduced as an additive to build a stable solid electrolyte interphase layer. The amyl-TPP cations can form a cation shielding layer on the metal surface during the nucleation stage, preventing K+ from gathering at the tip to form K dendrites. Besides, the cations can be preferentially reduced to form Kx Py with fast K+ transport kinetics. The Br- anions, as Lewis bases with strong electronegativity, can not only coordinate the Lewis acid pentafluoride to inhibit the formation of HF, but also change the K+ solvation structure to reduce solvent molecules in the first solvation structure. Therefore, the symmetrical battery exhibits a low deposition overpotential of 123 mV at 0.1 mA cm-2 over 4200 h cycle life. The full battery, paried with a perylene-tetracarboxylic dianhydride (PTCDA) cathode, possesses a cycle life of 250 cycles at 2 C and 81.9% capacity retention. This work offers a reasonable electrolyte design to obtain PMBs with long-term stablity and safety.
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Affiliation(s)
- Yong Jiang
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Shangying Lu
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Jinlong Jiang
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Meng Li
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Yalan Liao
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Yi Xu
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Shoushuang Huang
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Bing Zhao
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Jiujun Zhang
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
- Institute for Sustainable Energy/College of Sciences, Shanghai University, Shanghai, 200444, China
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