MnSe nanoparticles encapsulated into N-doped carbon fibers with a binder-free and free-standing structure for lithium ion batteries

Han, Zhengsi; Kong, Fanjun; Jian, Zheng; Chen, Jiyun; Tao, Shi; Qian, Bin

doi:10.1016/j.ceramint.2020.08.267

Cited by 31 publications

(17 citation statements)

References 29 publications

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“…It can be observed that the initial weight loss and the slow increase between 200°C and 460°C is a complex process, including the oxidation of Se and Mn, and the evaporation after reaching the sublimation temperature of SeO 2 . The huge weightlessness after 460°C could be attributed to the complete sublimation process of SeO 2 and the conversion of Si to SiO 2 and MnO 2 to Mn 2 O 3 37 . However, as for Si@MnSe@PPyC/rGO, the major loss of quality between 400°C and 600°C is mainly the result of a combination of two aspects: the oxidation of MnSe to Mn 2 O 3 , the sublimation of SeO 2 and the combustion of PPyC and rGO to CO 2 .…”

Section: Resultsmentioning

confidence: 99%

“…It can be seen that the measured reversible capacity of the composite material is higher than the theoretical value, which might be because some of the lithium ions stores in nanocavities of the composite. It is attributed to the fact that MnSe can maintain the flower‐like morphology, and its nanosheet structure and external conductive network ensure the smooth arrival of lithium ions and electrons, so that the theoretical properties of the three components can be fully utilized 37,38,43 …”

Section: Resultsmentioning

confidence: 99%

“…However, when composite with carbon material, the form of MnSe in the product is mostly nanoparticles. 17,37,44,[54][55][56][57] Because the particle size is small and evenly dispersed on the matrix of carbon material, the electrochemical performance is significantly improved. Only two kinds of materials achieve the special morphology of coaxial double nanotubes 38 or nanoboxes 58 supported by their own templates.…”

Section: Resultsmentioning

confidence: 99%

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A core@double‐shell structured silicon/ flower‐like manganese selenide/carbon composite as superior dual anode materials of Li/Na‐ion batteries

Wang

Song

et al. 2022

Intl J of Energy Research

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Summary One of the feasible solutions for enhancing new energy density of secondary batteries is to develop high‐performance dual anode materials for lithium and sodium‐ion batteries (LIBs&SIBs). To address this key challenge, we introduce a novel silicon/flower‐like manganese selenide/carbon composite (Si@MnSe@PPyC/rGO) with core@double‐shell structure as potential dual anode materials. The morphology, structure and composition of the composite are determined by means of SEM, TEM, EDS, XRD, Raman, TGA and XPS. The key to the successful synthesis process is that in situ polymerization of polypyrrole on the nanosheet of flower‐like Si@MnO2 preserves the intermediate layer with flower‐like morphology during selenization. Si@MnSe@PPyC/rGO exhibits the high performance owing to exceptional advantages such as the high capacity silicon core, the stable flower‐shaped MnSe and PPyC double shells as protective layer, as well as the excellent conductive network of rGO. This material delivers a greatly enhanced reversible capacity (803 mAh/g at 0.1 A/g), remarkable stability and excellent rate performance (437 mAh/g even at 3.2 A/g) in LIBs. For Na‐ion storage, it pleasantly reaches 323 mAh/g at 0.2 A/g and remains constant at 226.4 mAh/g after 500 cycles at 2.0 A/g. This study provides versatile strategy so as to maintain the unique morphology of nano‐metal oxide during selenization treatment, and supplies a cost‐effective strategy for preparing high‐performance dual‐anode materials for Li/Na‐ion storage. Novelty Statement Novel silicon/flower‐like manganese selenide/carbon composites (Si@MnSe@PPyC/rGO) with core@double‐shell structure are successfully fabricated as superior dual anode materials for Li/Na‐ion storage for the first time. The critical step is the in‐situ coating of PPy on the surface of nanosheets of Si@flower‐like MnO2 which could remain the original flower‐like morphology unchanged during selenization treatment. Si@MnSe@PPyC/rGO exhibits excellent potential as a dual anode material candidate for high performance Li/Na‐ion storage including high capacity, stable cycling performance and high rate capability.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

A core@double‐shell structured silicon/ flower‐like manganese selenide/carbon composite as superior dual anode materials of Li/Na‐ion batteries

Wang

Song

et al. 2022

Intl J of Energy Research

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“…It was surprisingly found that the discharge capacity in 0∼1.5 V at the second cycle was 244.5, and 209.0 mAh g –1 was retained after 1000 cycles (corresponding to 85.5% retention), suggesting that the GeP@NC-2 was very stable during long-term lithiation/delithiation and was very conductive to manufacture of high-voltage full cells. In addition, the discharge capacity of GeP@NC-2 was compared with that for the previously reported similar techniques used to improve rate and cycling performance. ,,,− It should be noted that except for Ref ., where the discharge/discharge voltage range was 0–1 V versus Li + /Li, the discharge/charge voltage range of other references was 0–3 V versus Li + /Li. Obviously, the GeP@NC-2 prepared in this study displayed higher capacity than that of Ref .…”

Section: Results and Discussionmentioning

confidence: 99%

Confining Nano-GeP in Nitrogenous Hollow Carbon Fibers toward Flexible and High-Performance Lithium-Ion Batteries

Zeng

Feng

Liu

et al. 2021

ACS Appl. Mater. Interfaces

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Although graphite has been used as anodes of lithium-ion batteries (LiBs) for 30 years, its unsatisfactory energy density makes it insufficient toward some new electronic products such as unmanned aerial vehicles. Herein, in situ synthesis of nano-GeP confined in nitrogen-doped carbon (GeP@NC) fibers was designed and performed via coaxial electrospinning followed by a phosphating process. This way ensured the paper-like GeP@NC-x electrode with high conductivity, high flexibility, and lightweight properties, which simultaneously solved the key scientific problems of difficulty in structural design and severe volume expansion of GeP. The inner diameter and wall thickness of the nanofibers can be effectively controlled by adjusting the size of electrospinning needles. It was suggested that the fibers not only effectively inhibited the growth of GeP, resulting in the synthesis of nano-GeP with size less than 50 nm, but also alleviated the volume expansion/agglomeration and improved the diffusion kinetics of Li+ in nano-GeP during cycling. The Li+ diffusion coefficient can be improved by reducing the inner diameter and wall thickness of the fibers. As a model system, the paper-like electrode (GeP@NC-2) with a fiber diameter of 280 nm and a wall thickness of 110 nm exhibited the best electrochemical performance. When applied as anodes in LiBs, it displayed a reversible capacity of 612 mAh g–1 at the 600th cycle at 1 A g–1, while GeP@NC-0 with a solid structure only delivered 239 mAh g–1. Furthermore, the GeP@NC-2 also exhibited good long-term cycling stability at 5 A g–1, and the capacity displayed a slight difference of 221.2 and 209.0 mAh g–1 in a voltage range of 0∼3 V and 0∼1.5 V, respectively. The well-defined synthetic approach combined with unique nanostructural design provided a meaningful reference for the rational design and development of next-generation flexible and high-performance LiB anodes.

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“…However, its application in aluminum-ion batteries is limited due to the large volume change of selenide electrode materials . In 2021, Han et al prepared MnSe nanoparticles encapsulated in N-carbon fibers, which were designed and prepared by electrospinning and calcination methods . Since the selenide is encapsulated in the carbon fiber, the volume change of the cathode material during the electrochemical reaction is reduced.…”

Section: Introductionmentioning

confidence: 99%

Novel One-Dimensional Nanofiber MnSe/CMK-3 High-Performance Cathode Material for Aluminum Batteries

Zhang

Yang

et al. 2022

ACS Appl. Mater. Interfaces

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Transition metal selenides have shown outstanding performance as cathode materials for aluminum-ion batteries and have thus become a popular choice for cathode materials. Herein, Mn-based carbon fibers (Mn/CNFs) were first synthesized by electrospinning as a precursor, and then MnSe composites were prepared by a melt-diffusion method. However, due to polyselenides and selenides being generated during electrochemical reactions, the cycling stability of MnSe cathode materials is poor. After 200 cycles, the discharge specific capacity is only 176 mA h/ g. To suppress the shuttle effect of selenides and polyselenides, a CMK-3-modified separator was used instead of a glass fiber separator. Compared with MnSe-800, the replaced MnSe-800/ CMK-3 has a great capacity improvement; the initial discharge specific capacity is 1029.85 mA h/g, which after 3000 cycles, still remains at 297.84 mA h/g. The soft pack battery can still light up the LED normally under different degrees of folding, which proves the application of this material in wearable devices. This work provides a new way to improve the performance of transition metal selenides.

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MnSe nanoparticles encapsulated into N-doped carbon fibers with a binder-free and free-standing structure for lithium ion batteries

Cited by 31 publications

References 29 publications

A core@double‐shell structured silicon/ flower‐like manganese selenide/carbon composite as superior dual anode materials of Li/Na‐ion batteries

A core@double‐shell structured silicon/ flower‐like manganese selenide/carbon composite as superior dual anode materials of Li/Na‐ion batteries

Confining Nano-GeP in Nitrogenous Hollow Carbon Fibers toward Flexible and High-Performance Lithium-Ion Batteries

Novel One-Dimensional Nanofiber MnSe/CMK-3 High-Performance Cathode Material for Aluminum Batteries

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