Encapsulating segment-like antimony nanorod in hollow carbon tube as long-lifespan, high-rate anodes for rechargeable K-ion batteries

Luo, Wen; Li, Feng; Zhang, Weiran; Han, Kang; Gaumet, Jean‐Jacques; Schaefer, H.‐E.; Mai, Liqiang

doi:10.1007/s12274-019-2335-6

Cited by 88 publications

(50 citation statements)

References 45 publications

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“…As is best known, it is seldom for the reported anode electrodes of PIBs to maintain the high capacity after 10 000 cycles (Figure S13, Supporting Information). Besides, as being tested at the higher current densities of 5 and 10 A g −1 , the ED‐MoS 2 @CT electrode can still deliver the capacities of 124.2 and 97.8 mAh g −1 after 4000 cycles, respectively, which is superior to the current state‐of‐the‐art anode materials of PIBs (Figure g) …”

Section: Resultsmentioning

confidence: 95%

Controlled Design of Well‐Dispersed Ultrathin MoS₂ Nanosheets inside Hollow Carbon Skeleton: Toward Fast Potassium Storage by Constructing Spacious “Houses” for K Ions

Cui

Liu

Feng

et al. 2020

Adv Funct Materials

146

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The large volume expansion induced by K+ intercalation is always a big challenge for designing high‐performance electrode materials in potassium‐ion storage system. Based on the idea that large‐sized ions should accommodate big “houses,” a facile‐induced growth strategy is proposed to achieve the self‐loading of MoS2 clusters inside a hollow tubular carbon skeleton (HTCS). Meantime, a step‐by‐step intercalation technology is employed to tune the interlayer distance and the layer number of MoS2. Based on the above, the ED‐MoS2@CT hybrids are achieved by self‐loading and anchoring the well‐dispersed ultrathin MoS2 nanosheets on the inner surface of HTCSs. This unique compositing model not only alleviates the mechanical strain efficiently, but also provides spacious “roads” (hollow tubular carbon skeleton) and “houses” (interlayer expanded ultrathin MoS2 sheets) for fast K+ transition and storage. As an anode of potassium‐ion batteries, the resultant ED‐MoS2@CT electrode delivers a high specific capacity of 148.5 mAh g−1 at 2 A g−1 after 10 000 cycles with only 0.002% fading per cycle. The assembled ED‐MoS2@CT//PC potassium‐ion hybrid supercapacitor device shows a high energy density of 148 Wh kg−1 at a power density of 965 W kg−1, which is comparable to that of lithium‐ion hybrid supercapacitors.

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Section: Resultsmentioning

confidence: 95%

Controlled Design of Well‐Dispersed Ultrathin MoS₂ Nanosheets inside Hollow Carbon Skeleton: Toward Fast Potassium Storage by Constructing Spacious “Houses” for K Ions

Cui

Liu

Feng

et al. 2020

Adv Funct Materials

146

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“…The first one is that regulating the microstructure of electrode materials to leave enough space for holding the volume expansion. [ 31 ] The other one is introducing a matrix into the electrode to relief the stress brought by volume changes. Wang's group reports a high‐capacity Sb@CSN anode, in which Sb nanoparticles are uniformly encapsulated by a carbon sphere network.…”

Section: Introductionmentioning

confidence: 99%

Flexible Antimony@Carbon Integrated Anode for High‐Performance Potassium‐Ion Battery

Cao

Liu

Jia

et al. 2020

Adv Materials Technologies

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Potassium‐ion batteries (KIBs) are considered as promising alternatives to lithium‐ion batteries due to the abundant resources, low cost, and low redox potential of K. However, KIBs anode materials suffer challenges owing to the large K+ radius and slow reaction dynamics, which result in low reversible capacity and inferior rate capability. Herein, Sb nanoparticles (about 4 nm) confined in an interconnecting carbon porous nanofibers (Sb@C PNFs) are constructed as flexible integrated KIBs anode. In this architecture, Sb nanoparticles are encapsulated and vessel‐like channels are contained in the N‐doping carbon porous nanofibers, which are adopted as the continuous 3D conductive framework and current collector. Benefiting from the shortened K+ diffusion distance, efficient electrolyte diffusion passages, and reserved space for holding volume swelling, the flexible Sb@C PNFs integrated electrode exhibits excellent K+ storage behaviors (capacities of 399.7 mAh g−1 at 0.1 A g−1 and 208.1 mAh g−1 at 5.0 A g−1 are delivered, respectively, and a capacity of 264.0 mAh g−1 is remained even cycled at 2.0 A g−1 after 500 cycles), and is among the best anode materials up to date. Moreover, the high reversible alloying and dealloying process between cubic K3Sb and as‐formed amorphous Sb in the Sb@C PNFs is confirmed.

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“…[20] This phenomenon will lead to active material pulverization and exfoliating from current collector, thus resulting in rapid capacity decay. [21,22] Therefore,d eveloping high-capacity alloy-type anode materials with long-term operation stability for PIBs still remains ag reat challenge.…”

Section: Introductionmentioning

confidence: 99%

Unveiling the Advances of Nanostructure Design for Alloy‐Type Potassium‐Ion Battery Anodes via In Situ TEM

et al. 2020

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Nanostructure design and in situ transmission electron microscopy (TEM) are combined to demonstrate Sb‐based nanofibers composed of bunched yolk–shell building units as a significantly improved anode for potassium‐ion batteries (PIBs). Particularly, a metal–organic frameworks (MOFs)‐engaged electrospinning strategy coupled to a confined ion‐exchange followed by a subsequent thermal reduction is proposed to fabricate yolk–shell Sb@C nanoboxes embedded in carbon nanofibers (Sb@CNFs). In situ TEM analysis reveals that the inner Sb nanoparticles undergo a significant volume expansion/contraction during the alloying/dealloying processes, while the void space can effectively relieve the overall volume change, and the plastic carbon shell maintains the structural integrity of electrode material. This work provides an important reference for the application of advanced characterization techniques to guide the optimization of electrode material design.

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Encapsulating segment-like antimony nanorod in hollow carbon tube as long-lifespan, high-rate anodes for rechargeable K-ion batteries

Cited by 88 publications

References 45 publications

Controlled Design of Well‐Dispersed Ultrathin MoS₂ Nanosheets inside Hollow Carbon Skeleton: Toward Fast Potassium Storage by Constructing Spacious “Houses” for K Ions

Controlled Design of Well‐Dispersed Ultrathin MoS₂ Nanosheets inside Hollow Carbon Skeleton: Toward Fast Potassium Storage by Constructing Spacious “Houses” for K Ions

Flexible Antimony@Carbon Integrated Anode for High‐Performance Potassium‐Ion Battery

Unveiling the Advances of Nanostructure Design for Alloy‐Type Potassium‐Ion Battery Anodes via In Situ TEM

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Encapsulating segment-like antimony nanorod in hollow carbon tube as long-lifespan, high-rate anodes for rechargeable K-ion batteries

Cited by 88 publications

References 45 publications

Controlled Design of Well‐Dispersed Ultrathin MoS2 Nanosheets inside Hollow Carbon Skeleton: Toward Fast Potassium Storage by Constructing Spacious “Houses” for K Ions

Controlled Design of Well‐Dispersed Ultrathin MoS2 Nanosheets inside Hollow Carbon Skeleton: Toward Fast Potassium Storage by Constructing Spacious “Houses” for K Ions

Flexible Antimony@Carbon Integrated Anode for High‐Performance Potassium‐Ion Battery

Unveiling the Advances of Nanostructure Design for Alloy‐Type Potassium‐Ion Battery Anodes via In Situ TEM

Contact Info

Product

Resources

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Controlled Design of Well‐Dispersed Ultrathin MoS₂ Nanosheets inside Hollow Carbon Skeleton: Toward Fast Potassium Storage by Constructing Spacious “Houses” for K Ions

Controlled Design of Well‐Dispersed Ultrathin MoS₂ Nanosheets inside Hollow Carbon Skeleton: Toward Fast Potassium Storage by Constructing Spacious “Houses” for K Ions