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Zhang Y, Zhao G, Lv X, Tian Y, Yang L, Zou G, Hou H, Zhao H, Ji X. Exploration and Size Engineering from Natural Chalcopyrite to High-Performance Electrode Materials for Lithium-Ion Batteries. ACS Appl Mater Interfaces 2019; 11:6154-6165. [PMID: 30645091 DOI: 10.1021/acsami.8b22094] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Compared to chemosynthetic CuFeS2, natural chalcopyrite (CuFeS2) can be regarded as a promising anode material for exploring ultrafast and stable Li-ion batteries benefiting from it being firsthand, eco-friendly, and resource-rich. Considering the nonuniform size distribution in it and the fact that homogeneous grain distributions can effectively restrain the aggregation of active materials, the engineering of size is deemed an effective strategy to achieve excellent Li-storage performances. Herein, varisized natural CuFeS2 are obtained by facial mineral processing technology and outstanding Li-storage performances are exhibited. Along with the decreasing of size, the contribution of pseudocapacitive as well as the ion transfer rates are significantly boosted. As expected, even at 1 A g-1, a remarkable capacity of 1009.7 mA h g-1 is displayed by the sample with the smallest size and most uniform distributions even after 500 cycles. Furthermore, supported by the detailed analysis of in situ X-ray diffraction and kinetic features, a hybrid of multiple lithium-metal sulfur systems and the major origin of the enhanced capacity upon long cycles are confirmed. Remarkably, this work is expected to increase the far-ranging applications of natural chalcopyrite as a firsthand anode material for lithium-ion batteries (LIBs) and inform the readers about the effects of particle size on Li-storage performances.
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Li S, Tang H, Ge P, Jiang F, Zhou J, Zhang C, Hou H, Sun W, Ji X. Electrochemical Investigation of Natural Ore Molybdenite (MoS 2) as a First-Hand Anode for Lithium Storages. ACS Appl Mater Interfaces 2018; 10:6378-6389. [PMID: 29376632 DOI: 10.1021/acsami.7b18571] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Considering serious pollution from the traditional chemical synthesis process, the resource-rich, clean, and first-hand electrode materials are greatly desired. Natural ore molybdenite (MoS2), as the low-cost, high-yield, and environmental-friendly natural source, is investigated as a first-hand anode material for lithium-ion batteries (LIBs). Compared with chemosynthetic pure MoS2, natural molybdenite provides an ordered ion diffusion channel more effectively owing to its excellent characteristics, containing well-crystalline, large lattice distance, and trance dopants. Even at a large current density of 2.0 A g-1, a natural molybdenite electrode employing a carboxymethyl cellulose binder displays an initial charge capacity of 1199 mA h g-1 with a capacity retention of 72% after 1000 cycles, much higher than those of the electrodes utilizing a poly(vinylidene fluoride) binder. These types of binders play a crucial role in stabilizing a microstructure demonstrated by ex situ scanning electron microscopy and in affecting pseudocapacitive contributions quantitatively determined by a series of kinetic exploration. Briefly, this work might open up a new avenue toward the use of natural molybdenite as a first-hand LIB anode in scalable applications and deepen our understanding on the fundamental effect of binders in the metal-sulfide.
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Affiliation(s)
- Sijie Li
- College of Chemistry and Chemical Engineering, ‡State Key Laboratory of Powder Metallurgy, and §School of Minerals Processing and Bioengineering, Central South University , Changsha 410083, China
| | - Honghu Tang
- College of Chemistry and Chemical Engineering, ‡State Key Laboratory of Powder Metallurgy, and §School of Minerals Processing and Bioengineering, Central South University , Changsha 410083, China
| | - Peng Ge
- College of Chemistry and Chemical Engineering, ‡State Key Laboratory of Powder Metallurgy, and §School of Minerals Processing and Bioengineering, Central South University , Changsha 410083, China
| | - Feng Jiang
- College of Chemistry and Chemical Engineering, ‡State Key Laboratory of Powder Metallurgy, and §School of Minerals Processing and Bioengineering, Central South University , Changsha 410083, China
| | - Jiahui Zhou
- College of Chemistry and Chemical Engineering, ‡State Key Laboratory of Powder Metallurgy, and §School of Minerals Processing and Bioengineering, Central South University , Changsha 410083, China
| | - Chenyang Zhang
- College of Chemistry and Chemical Engineering, ‡State Key Laboratory of Powder Metallurgy, and §School of Minerals Processing and Bioengineering, Central South University , Changsha 410083, China
| | - Hongshuai Hou
- College of Chemistry and Chemical Engineering, ‡State Key Laboratory of Powder Metallurgy, and §School of Minerals Processing and Bioengineering, Central South University , Changsha 410083, China
| | - Wei Sun
- College of Chemistry and Chemical Engineering, ‡State Key Laboratory of Powder Metallurgy, and §School of Minerals Processing and Bioengineering, Central South University , Changsha 410083, China
| | - Xiaobo Ji
- College of Chemistry and Chemical Engineering, ‡State Key Laboratory of Powder Metallurgy, and §School of Minerals Processing and Bioengineering, Central South University , Changsha 410083, China
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Kennedy T, Bezuidenhout M, Palaniappan K, Stokes K, Brandon M, Ryan KM. Nanowire Heterostructures Comprising Germanium Stems and Silicon Branches as High-Capacity Li-Ion Anodes with Tunable Rate Capability. ACS Nano 2015; 9:7456-7465. [PMID: 26125966 DOI: 10.1021/acsnano.5b02528] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Here we report the rational design of a high-capacity Li-ion anode material comprising Ge nanowires with Si branches. The unique structure provides an electrode material with tunable properties, allowing the performance to be tailored for either high capacity or high rate capability by controlling the mass ratio of Si to Ge. The binder free Si-Ge branched nanowire heterostructures are grown directly from the current collector and exhibit high capacities of up to ∼1800 mAh/g. Rate capability testing revealed that increasing the Ge content within the material boosted the performance of the anode at fast cycling rates, whereas a higher Si content was optimal at slower rates of charge and discharge. Using ex-situ electron microscopy, Raman spectroscopy and energy dispersive X-ray spectroscopy mapping, the composition of the material is shown to be transient in nature, transforming from a heterostructure to a Si-Ge alloy as a consequence of repeated lithiation and delithiation.
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Affiliation(s)
- Tadhg Kennedy
- †Materials and Surface Science Institute, and ‡Department of Chemical and Environmental Sciences, University of Limerick, Limerick, Ireland
| | - Michael Bezuidenhout
- †Materials and Surface Science Institute, and ‡Department of Chemical and Environmental Sciences, University of Limerick, Limerick, Ireland
| | - Kumaranand Palaniappan
- †Materials and Surface Science Institute, and ‡Department of Chemical and Environmental Sciences, University of Limerick, Limerick, Ireland
| | - Killian Stokes
- †Materials and Surface Science Institute, and ‡Department of Chemical and Environmental Sciences, University of Limerick, Limerick, Ireland
| | - Michael Brandon
- †Materials and Surface Science Institute, and ‡Department of Chemical and Environmental Sciences, University of Limerick, Limerick, Ireland
| | - Kevin M Ryan
- †Materials and Surface Science Institute, and ‡Department of Chemical and Environmental Sciences, University of Limerick, Limerick, Ireland
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