A self-supported carbon nanofiber paper/sulfur anode with high-capacity and high-power for application in Li-ion batteries

Gao, Tian; Qu, Qunting; Zhu, Guobin; Shi, Qiang; Feng, Qian; Shao, Jie; Zheng, Honghe

doi:10.1016/j.carbon.2016.09.027

Cited by 16 publications

(5 citation statements)

References 56 publications

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“…v) The density and purity of the materials can be controlled . vi) The surface morphology can be modified by changing the direction and speed of the gas flow …”

Section: Porous Cathode Architectures For Li–s Batteriesmentioning

confidence: 99%

Fabrication Methods of Porous Carbon Materials and Separator Membranes for Lithium–Sulfur Batteries: Development and Future Perspectives

et al. 2017

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Lithium–sulfur batteries (Li–S batteries) have a five times higher energy density than state‐of‐the‐art lithium‐ion batteries and have attracted world‐wide attention. However, many inherent problems limit the practical application of Li–S batteries. Among them, the dissolution of polysulfides, which is called the “shuttle effect”, is rather severe and usually causes irreversible capacity decay. Many methods have been developed to overcome this problem, including the rational design of porous cathode hosts, modification of separators to prevent the migration of polysulfides, and the addition of transition‐metal oxides for polysulfide adsorption. Here, the various preparation methods for the development of high performance Li–S batteries are reviewed. The advantages and disadvantages of each method are discussed in detail, shedding light on directions for further research and development in the future.

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“…v) The density and purity of the materials can be controlled . vi) The surface morphology can be modified by changing the direction and speed of the gas flow …”

Section: Porous Cathode Architectures For Li–s Batteriesmentioning

confidence: 99%

Fabrication Methods of Porous Carbon Materials and Separator Membranes for Lithium–Sulfur Batteries: Development and Future Perspectives

et al. 2017

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“…However, due to its inherently low conductivity, LiMn x Fe 1– x PO 4 (LMFP) has a poor discharge capacity. At present, the most feasible path to increase the conductivity of materials is carbon coating. − Hao prepared the LiFePO 4 nanoparticles coated with carbon by a combination of one-step in situ solvent method and thermal reduction method . Yan prepared the LiFePO 4 /C microsphere material using a combination of spray drying and coprecipitation, and it was accomplished using a lower temperature and a simple calcination mechanism .…”

Section: Introductionmentioning

confidence: 99%

Double-Layer Carbon-Coating Method for Simultaneous Improvement of Conductivity and Tap Density of LiMn_0.65Fe_0.35PO₄/C/KB Cathode Materials

Ren

Zheng

et al. 2020

ACS Appl. Energy Mater.

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A LiMn0.65Fe0.35PO4/C/KB composite with superior electronic conductivity and high tap density is synthesized by a double-layer carbon-coating method with Ketjen Black (KB) as a carbon additive. On the one hand, as an excellent conductive material, KB usually presents a unique chainlike structure, and due to the strong van der Waals forces, the structure tends to be tightly gathered. Therefore, when KB is used for carbon coating, the primary particles of LiMn0.65Fe0.35PO4 coated by KB could also be tightly aggregated. Therefore, the addition of KB simultaneously improved the tap density (1.6 g cm–3) and conductivity (8.6 × 10–2 S cm–1) of LiMn0.65Fe0.35PO4. On the other hand, the unique structure of KB also brings a large specific surface area, which has powerful surface energy, so it often tends to perform agglomeration when used as an additive. In this work, two-step sintering was used to solve this problem, which can form a double-layer carbon coating composed of amorphous carbon (formed by the carbonization of glucose) in the inner layer and KB in the outer layer. Thus, KB can effectively adhere to the amorphous carbon to prevent the agglomeration of KB. Combining the exploration of the amount of KB added and the double-layer coating method, we showed that the LiMn0.65Fe0.35PO4/C/KB composite with 5% KB additive exhibits a high discharge capacity of 159.3 mAh g–1 at 0.2C and an excellent capacity retention of 96.8% at 1C rate after 500 cycles. In addition, due to the high surface area of KB, sufficient liquid electrolyte can be absorbed to increase the exchange rate of lithium ions at the electrode interface.

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“…The environmental issues and the depletion of fossil fuels promote the development of clean energy. − In recent years, with the large application of rechargeable Li-ion batteries in electric vehicles and energy storage systems, electrode materials with high energy, fast charging rate, and low cost have attracted increasing attention. − Among the several kinds of cathode materials, the layered Ni-rich cathode material LiNi 1 –x–y Co x Mn y O 2 (1 – x – y ≥ 0.5) is considered one of the most promising alternatives. − Especially, LiNi 0.8 Co 0.1 Mn 0.1 O 2 shows the most potential for its lower cost, lower toxicity, and higher capacity compared to the commercial LiCoO 2 . − However, the high content of Ni causes a deterioration of structure due to the increased Li/Ni disorder and the production of highly reactive Ni 4+ ions in the delithiated state that can react with the organic electrolyte. ,− …”

Section: Introductionmentioning

confidence: 99%

Metallurgy Inspired Formation of Homogeneous Al₂O₃ Coating Layer To Improve the Electrochemical Properties of LiNi_0.8Co_0.1Mn_0.1O₂ Cathode Material

Dong

Wang

et al. 2017

ACS Sustainable Chem. Eng.

147

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Inspired by the metallurgical process of aluminum production, a controllable and cost-effective Al2O3 coating strategy is introduced to improve the surface stability of LiNi0.8Co0.1Mn0.1O2. The CO2 is introduced to NaAlO2 aqueous solution to generate a weak basic condition that is able to decrease the deposition rate of Al(OH)3 and is beneficial to the uniform coating of Al(OH)3 on the surface of commercial Ni0.8Co0.1Mn0.1(OH)2 precursor. The electrochemical performance of Al2O3-coated LiNi0.8Co0.1Mn0.1O2 is improved at both ordinary cutoff voltage of 4.3 V and elevated cutoff voltage of 4.5 V. With the optimized Al2O3 coating amount (1%), the capacity retention of the material after 60 cycles increases from 90% to 99% at 2.8–4.3 V and from 86% to 99% at 2.8–4.5 V, respectively. The Al2O3-coated sample also delivers a better rate capability, maintaining 117 and 131 mA h g–1 in the voltage ranges 2.8–4.3 and 2.8 V–4.5 V at the current density of 5 C, respectively. The enhanced properties of as-prepared Al2O3-coated LiNi0.8Co0.1Mn0.1O2 are due to the Al2O3 coating layer building up a favorable interface, preventing the direct contact between the active material and electrolyte and promoting Li+ transmission at the interface.

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A self-supported carbon nanofiber paper/sulfur anode with high-capacity and high-power for application in Li-ion batteries

Cited by 16 publications

References 56 publications

Fabrication Methods of Porous Carbon Materials and Separator Membranes for Lithium–Sulfur Batteries: Development and Future Perspectives

Fabrication Methods of Porous Carbon Materials and Separator Membranes for Lithium–Sulfur Batteries: Development and Future Perspectives

Double-Layer Carbon-Coating Method for Simultaneous Improvement of Conductivity and Tap Density of LiMn_0.65Fe_0.35PO₄/C/KB Cathode Materials

Metallurgy Inspired Formation of Homogeneous Al₂O₃ Coating Layer To Improve the Electrochemical Properties of LiNi_0.8Co_0.1Mn_0.1O₂ Cathode Material

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A self-supported carbon nanofiber paper/sulfur anode with high-capacity and high-power for application in Li-ion batteries

Cited by 16 publications

References 56 publications

Fabrication Methods of Porous Carbon Materials and Separator Membranes for Lithium–Sulfur Batteries: Development and Future Perspectives

Fabrication Methods of Porous Carbon Materials and Separator Membranes for Lithium–Sulfur Batteries: Development and Future Perspectives

Double-Layer Carbon-Coating Method for Simultaneous Improvement of Conductivity and Tap Density of LiMn0.65Fe0.35PO4/C/KB Cathode Materials

Metallurgy Inspired Formation of Homogeneous Al2O3 Coating Layer To Improve the Electrochemical Properties of LiNi0.8Co0.1Mn0.1O2 Cathode Material

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Double-Layer Carbon-Coating Method for Simultaneous Improvement of Conductivity and Tap Density of LiMn_0.65Fe_0.35PO₄/C/KB Cathode Materials

Metallurgy Inspired Formation of Homogeneous Al₂O₃ Coating Layer To Improve the Electrochemical Properties of LiNi_0.8Co_0.1Mn_0.1O₂ Cathode Material