Core–shell structured SnSe@C microrod for Na-ion battery anode

Kong, Fanjun; Han, Zhengsi; Tao, Shi; Qian, Bin

doi:10.1016/j.jechem.2020.07.016

Cited by 74 publications

(38 citation statements)

References 57 publications

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“…[ 32,33 ] These cathodic peaks were not detected in the SnSe‐C electrode, indicating the presence of sulfur in SnSeS@C. Subsequently, a cathodic peak around 1.0 V was observed in both samples, indicating the formation of sodium‐intercalated compounds. [ 34 ] In addition, the reduction of the carbonate‐based electrolyte in the sodium‐ion battery (SIB) system led to the formation of a solid electrolyte interphase (SEI) layer in the two samples near 0.3 V. [ 35 ] To clearly demonstrate the cathodic peaks of the carbon component, CV analysis of pure hollow porous carbon nanospheres was performed under the same conditions, as shown in Figure S7 (Supporting Information). The cathodic peaks at around 1.0 and 0.4 V during the initial discharging process coincided with the initial cathodic peaks in Figure 3a,b.…”

Section: Resultsmentioning

confidence: 99%

Yolk‐Shell‐Structured Nanospheres with Goat Pupil‐Like S‐Doped SnSe Yolk and Hollow Carbon‐Shell Configuration as Anode Material for Sodium‐Ion Storage

Park

Kang

2021

Small Methods

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Rationally nanostructured electrode materials exhibit excellent sodium‐ion storage performance. In particular, yolk–shell configurations of metal chalcogenide@void@C are introduced in various synthetic strategies for use as superior anode materials. Herein, yolk‐shell‐structured nanospheres, with goat pupil‐like configuration of S‐doped SnSe yolks and hollow carbon shells, are synthesized by salt‐infiltration and a simple post‐treatment procedure. Impressively, the co‐infiltration of thiourea and selenium oxide enables the doping of sulfur into SnSe (SnSeS) and carbon shells, as well as the formation of a goat pupil‐like yolk–shell architecture. High‐reactivity thiourea‐derived H2S gas forms nanocrystals inside the carbon nanospheres. The nanocrystals act as seeds for the crystal growth of SnSeS through Ostwald ripening. The unique yolk–shell structure and composition with a heterointerface provide not only structural stability but also fast electrode reaction kinetics during repeated cycling. The SnSeS@C electrode shows an excellent cycle life (186 mA h g−1 for 1000 cycles at 0.5 A g−1) and rate capability (112 mA h g−1 at 5.0 A g−1).

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Section: Resultsmentioning

confidence: 99%

Yolk‐Shell‐Structured Nanospheres with Goat Pupil‐Like S‐Doped SnSe Yolk and Hollow Carbon‐Shell Configuration as Anode Material for Sodium‐Ion Storage

Park

Kang

2021

Small Methods

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“…The capacitance contribution to the total capacity can be quantitatively obtained by eq where k 1 v and k 2 v 1/2 are the pseudocapacitive and diffusion-controlled currents, respectively. As shown in Figures S14a and c, the contribution of pseudocapacitive to the total current for LIBs gradually increases from 58.1 to 87.6% with the increment of the sweep rate, revealing fast charge transfer . Moreover, the electrochemical kinetics mechanism of Sn@Mn 2 SnO 4 -NC for SIBs was also explored by corresponding kinetic analyses (Figure d).…”

Section: Results and Discussionmentioning

confidence: 99%

Binary-Metal Mn₂SnO₄ Nanoparticles and Sn Confined in a Cubic Frame with N-Doped Carbon for Enhanced Lithium and Sodium Storage

Wan

Liu

Cheng

et al. 2021

ACS Appl. Mater. Interfaces

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Sn-based materials have been popularly researched as anodes for energy storage due to their high theoretical capacity. However, the sluggish reaction kinetics and unsatisfied cycling stability caused by poor conductivity and dramatic volume expansion are still pivotal barriers for the development of Sn-based materials as anodes. In this work, the binary-metal Mn2SnO4 nanoparticles and Sn encapsulated in N-doped carbon (Sn@Mn2SnO4-NC) were fabricated by multistep reactions and employed as the anode for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs). The coexistence of binary metals (Sn and Mn) can improve intrinsic conductivity. Simultaneously, hollow architecture along with carbon relieves internal stress and prevents structural collapse. A Sn@Mn2SnO4-NC anode delivers an appealing capacity of 1039.5 mAh g–1 for 100 cycles at 100 mA g–1 and 823.8 mAh g–1 for 600 cycles at 1000 mA g–1 in LIBs. When evaluated as an anode in SIBs, the Sn@Mn2SnO4-NC anode tolerates up to 7000 cycles at 2000 mA g–1 and maintains a capacity of 185.8 mAh g–1. Quantified kinetic investigations demonstrate the high contribution of pseudocapacitive effects during the cycle process. Furthermore, density functional theory (DFT) calculations further verify that introduction of the second metal (Mn) improves the conductivity of the material, which is favorable for charge transport. This work is expected to provide a feasible preparation strategy for binary-metal materials to enhance the performance of lithium- and sodium-ion batteries.

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“…Recently, various reports ( Liu et al, 2018 ; Wang et al, 2020a ; Kong et al, 2021 ) revealed that it is an effective strategy to address these problems by constructing the core–shell structure, with the active material as the core and the conductive carbon layer as the shell. For example, Tao Liu et al (2018) presented a facile and efficient template method for the synthesis of core–shell Co 3 O 4 /nitrogen-doped carbon hollow spheres, which deliver an excellent electrochemical performance.…”

Section: Introductionmentioning

confidence: 99%

“…The as-prepared material serving as both the positive and negative electrodes, deliver excellent electrochemical performance. Fanjun Kong et al (2021) obtained the core–shell SnSe@C with high performance by electrospinning, which display superior cycling and rate performance owing to this compact core–shell structure. All these examples show that the core-shell structure with carbon material as the shell can effectively reduce the volume expansion effect and greatly improve the electrochemical performance.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-Doped Carbon Encapsulated Partial Zinc Stannate Nanocomposite for High-Performance Energy Storage Materials

Liu

Zhang

et al. 2021

Front. Chem.

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As a bimetal oxide, partial zinc stannate (ZnSnO3) is one of the most promising next-generation lithium anode materials, which has the advantages of low operating voltage, large theoretical capacity (1,317 mA h g−1), and low cost. However, the shortcomings of large volume expansion and poor electrical conductivity hinder its practical application. The core-shell ZnSnO3@ nitrogen-doped carbon (ZSO@NC) nanocomposite was successfully obtained by coating ZnSnO3 with polypyrrole (PPy) through in situ polymerization under ice-bath conditions. Benefiting from this unique compact structure, the shell formed by PPy cannot only effectively alleviate the volume expansion effect of ZnSnO3 but also enhance the electrical conductivity, thus, greatly improving the lithium storage performance. ZSO@NC can deliver a reversible capacity of 967 mA h g−1 at 0.1 A g−1 after 300 cycles and 365 mA h g−1 at 2 A g−1 after 1,000 cycles. This work may provide a new avenue for the synthesis of bimetal oxide with a core–shell structure for high-performance energy storage materials.

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Core–shell structured SnSe@C microrod for Na-ion battery anode

Cited by 74 publications

References 57 publications

Yolk‐Shell‐Structured Nanospheres with Goat Pupil‐Like S‐Doped SnSe Yolk and Hollow Carbon‐Shell Configuration as Anode Material for Sodium‐Ion Storage

Yolk‐Shell‐Structured Nanospheres with Goat Pupil‐Like S‐Doped SnSe Yolk and Hollow Carbon‐Shell Configuration as Anode Material for Sodium‐Ion Storage

Binary-Metal Mn₂SnO₄ Nanoparticles and Sn Confined in a Cubic Frame with N-Doped Carbon for Enhanced Lithium and Sodium Storage

Nitrogen-Doped Carbon Encapsulated Partial Zinc Stannate Nanocomposite for High-Performance Energy Storage Materials

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Core–shell structured SnSe@C microrod for Na-ion battery anode

Cited by 74 publications

References 57 publications

Yolk‐Shell‐Structured Nanospheres with Goat Pupil‐Like S‐Doped SnSe Yolk and Hollow Carbon‐Shell Configuration as Anode Material for Sodium‐Ion Storage

Yolk‐Shell‐Structured Nanospheres with Goat Pupil‐Like S‐Doped SnSe Yolk and Hollow Carbon‐Shell Configuration as Anode Material for Sodium‐Ion Storage

Binary-Metal Mn2SnO4 Nanoparticles and Sn Confined in a Cubic Frame with N-Doped Carbon for Enhanced Lithium and Sodium Storage

Nitrogen-Doped Carbon Encapsulated Partial Zinc Stannate Nanocomposite for High-Performance Energy Storage Materials

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Binary-Metal Mn₂SnO₄ Nanoparticles and Sn Confined in a Cubic Frame with N-Doped Carbon for Enhanced Lithium and Sodium Storage