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Cong G, Huang L, Yang G, Song J, Liu S, Huang Y, Zhang X, Liu Z, Geng L. Ni/Mg Dual Concentration-Gradient Surface Modification to Enhance Structural Stability and Electrochemical Performance of Li-Rich Layered Oxides. ACS APPLIED MATERIALS & INTERFACES 2024; 16:9999-10008. [PMID: 38361262 DOI: 10.1021/acsami.3c15115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
Li-rich layered oxides (LRLOs), with the advantages of high specific capacity and low cost, are considered as candidates for the next-generation cathode of lithium-ion batteries (LIBs). Unfortunately, sluggish kinetics and interfacial degradation lead to capacity loss and voltage decay of the material during cycling. To address these issues, we propose a Ni/Mg dual concentration-gradient modification strategy for LRLOs. From the center to the surface of the modified materials, the contents of Ni and Mg are gradually increased while the content of Mn is decreased. The high Ni content on the surface increases the proportion of cationic redox, elevating the operating voltage and accelerating reaction kinetics. Moreover, the doped Mg on the surface of the material acting as a stabilizing pillar suppresses the migration of transition metals, stabilizing the layered structure. Therefore, the material with the Ni/Mg dual concentration-gradients delivers a superior electrochemical performance, exhibiting a suppressed voltage decay of 2.8 mV per cycle during 200 cycles (1 C, 2-4.8 V) and an excellent rate capability of 94.84 mAh/g at 7C. This study demonstrates a synergic design to construct high-performance LRLO cathode materials for LIBs.
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Affiliation(s)
- Guanghui Cong
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - Lujun Huang
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - Guobo Yang
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - Jinpeng Song
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - Shaoshuai Liu
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - Yating Huang
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - Xin Zhang
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - Zheyuan Liu
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - Lin Geng
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China
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El Halya N, Kerroumi M, Elmaataouy EH, Amarray A, Aqil M, Alami J, Dahbi M. Limiting voltage and capacity fade of lithium-rich, low cobalt Li 1.2Ni 0.13Mn 0.54Fe 0.1Co 0.03O 2 by controlling the upper cut-off voltage. RSC Adv 2023; 13:34416-34426. [PMID: 38024962 PMCID: PMC10667673 DOI: 10.1039/d3ra06873k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Accepted: 11/21/2023] [Indexed: 12/01/2023] Open
Abstract
A new Li1.2Ni0.13Mn0.54Fe0.1Co0.03O2 material with a higher content of Fe and lower content of Co was designed via a simple sol-gel method. Moreover, the effect of upper cut-off voltage on the structural stability, capacity and voltage retention was studied. The Li1.2Ni0.13Mn0.54Fe0.1Co0.03O2 electrode delivers a discharge capacity of 250 mA h g-1 with good capacity retention and coulombic efficiency at 4.6 V cut-off voltage. Importantly, improved voltage retention of 94% was achieved. Ex situ XRD and Raman proved that the electrodes cycled at 4.8 V cut-off voltage showed huge structural conversion from layered-to-spinel explaining the poor capacity and voltage retention at this cut-off voltage. In addition, ex situ FT-IR demonstrates that the upper cut-off voltage of 4.8 V exhibits a higher intensity of SEI-related peaks than 4.6 V, suggesting that reducing the upper cut-off voltage can inhibit the growth of the SEI layer. In addition, when the Li1.2Ni0.13Mn0.54Fe0.1Co0.03O2 cathode was paired with a synthesized phosphorus-doped TiO2 anode (P-doped TiO2) in a complete battery cell, it exhibits good capacity and cycling stability at 1C rate. The material developed in this study represents a promising approach for designing high-performance Li-rich, low cobalt cathodes for next-generation lithium-ion batteries.
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Affiliation(s)
- Nabil El Halya
- Materials Science and Nano-engineering Department, Mohammed VI Polytechnic University Ben Guerir Morocco
| | - Mohamed Kerroumi
- Materials Science and Nano-engineering Department, Mohammed VI Polytechnic University Ben Guerir Morocco
| | - El Houcine Elmaataouy
- Materials Science and Nano-engineering Department, Mohammed VI Polytechnic University Ben Guerir Morocco
| | - Amina Amarray
- Materials Science and Nano-engineering Department, Mohammed VI Polytechnic University Ben Guerir Morocco
| | - Mohamed Aqil
- Materials Science and Nano-engineering Department, Mohammed VI Polytechnic University Ben Guerir Morocco
| | - Jones Alami
- Materials Science and Nano-engineering Department, Mohammed VI Polytechnic University Ben Guerir Morocco
| | - Mouad Dahbi
- Materials Science and Nano-engineering Department, Mohammed VI Polytechnic University Ben Guerir Morocco
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Ji X, Xu Y, Xia Q, Zhou Y, Song J, Feng H, Wang P, Yang J, Tan Q. Li-Deficient Materials-Decoration Restrains Oxygen Evolution Achieving Excellent Cycling Stability of Li-Rich Mn-Based Cathode. ACS APPLIED MATERIALS & INTERFACES 2022; 14:30133-30143. [PMID: 35739645 DOI: 10.1021/acsami.2c03073] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
With the increasing demand for high energy density and rapid charging performance, Li-rich materials have been the up and coming cathodes for next-generation lithium-ion batteries. However, because of oxygen evolution and structural instability, the commercialization of Li-rich materials is extremely retarded by their poor electrochemical performances. In this work, Li-deficient materials Li0.3NbO2 and (Nb0.62Li0.15)TiO3 are applied to functionalize the surface of Li1.2Mn0.54Ni0.13Co0.13O2, aiming to suppress oxygen evolution and increase structural stability in LIBs. In addition, a fast Li-ion transport channel is beneficial to enhance Li+ diffusion kinetics. The results demonstrate that the electrodes decorated with Li0.3NbO2 and (Nb0.62Li0.15)TiO3 materials exhibit more stable cycling stability after long-term cycling and outstanding rate capability.
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Affiliation(s)
- Xueqian Ji
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuxing Xu
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- Hebei Technology Innovation Center of Advanced Energy Materials, Langfang 065001, China
| | - Qing Xia
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- Hebei Technology Innovation Center of Advanced Energy Materials, Langfang 065001, China
| | - Yuncheng Zhou
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jiechen Song
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hailan Feng
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- Hebei Technology Innovation Center of Advanced Energy Materials, Langfang 065001, China
| | - Pengfei Wang
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- Hebei Technology Innovation Center of Advanced Energy Materials, Langfang 065001, China
| | - Jun Yang
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Qiangqiang Tan
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- Hebei Technology Innovation Center of Advanced Energy Materials, Langfang 065001, China
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