Encapsulating MnO nanoparticles within foam-like carbon nanosheet matrix for fast and durable lithium storage

Xiao, Yuchen; Xu, Cheng‐Yan; Wang, Panpan; Fang, Hai‐Tao; Sun, Xueyin; Ma, Fei‐Xiang; Pei, Yi; Zhen, Liang

doi:10.1016/j.nanoen.2018.06.018

Cited by 104 publications

(74 citation statements)

References 60 publications

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“…1.30 V can be assigned to evolution from Mn 0 to Mn 2 + (Mn + Li 2 O!MnO + 2Li + + 2e À ). [15][16][17] It is noticed that the CV curves during 3rd-10th cycles almost overlap, revealing the prominent reversibility of electrochemical reactions for NC@MnO HHSs.…”

Section: Resultsmentioning

confidence: 92%

“…07-0230). [16] However, there are no distinguishing peaks from graphite, revealing the amorphous nature of carbon. [17,27] The C content of NC@MnO HHSs can be determined by TG ( Figure 4b).…”

Section: Resultsmentioning

confidence: 99%

“…1.25 V, corresponding to the conversion of MnO to Mn and the reverse, respectively. [8,16,22] The initial capacity loss of NC@MnO HHSs mainly results from the electrolyte decomposition and occurrence of the SEI film. [19,35] However, the obvious sloping voltage plateaus at ca.…”

Section: Resultsmentioning

confidence: 99%

“…[10,11] Unfortunately, the practical implementation of MnO-based anode materials is still obstructed because of their short cyclic life and unsatisfactory rate performance, attributable to their low conductivity, large volume variation and self-aggregation of MnO during intense cycles. [12][13][14] To overcome the aforementioned obstacles of MnO-based materials, various strategies are rationally designed, such as nanosizing of MnO, [15][16][17] constructing novel nanostructures (hierarchical, hollow and yolk-shelled nanostructures) [18][19][20][21][22][23] and hybridizing of the nitrogen-doped carbon. [22][23][24][25][26] The first strategy is to design nanosized MnO particles to decrease the Li-ion/ electron transfer distance and partly buffer the volume variation during intensive cycles, advantageous to the enhancement of their rate capability and cyclic stability.…”

Section: Introductionmentioning

confidence: 99%

“…[22][23][24][25][26] The first strategy is to design nanosized MnO particles to decrease the Li-ion/ electron transfer distance and partly buffer the volume variation during intensive cycles, advantageous to the enhancement of their rate capability and cyclic stability. [15][16][17] The second strategy is to construct novel hollow nanostructures, which can decrease the stress of cyclic volume changes owing to their big cavity in the center and provide more reaction sites for lithiation/ delithiation because of large surface area, leading to the prominent electrochemical properties. [20][21][22][23] MnO hierarchical hollow nanostructures built from aggregated nanoparticles in particular possess more prominent electrochemical properties compared with discrete nanoparticles and other solid particles.…”

Section: Introductionmentioning

confidence: 99%

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Highly Reversible Lithium Storage of Nitrogen‐Doped Carbon@MnO Hierarchical Hollow Spheres as Advanced Anode Materials

et al. 2019

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The practical implementation of MnO‐based anode materials is still obstructed because of their short cyclic life and unsatisfactory rate performance, attributable to low conductivity, large volume variation and self‐aggregation of MnO during intense cycles. To overcome these obstacles, we successfully fabricated nitrogen‐doped carbon@MnO hierarchical hollow spheres through a novel approach. As anode nanomaterials for Li‐ion batteries, the nanocomposite possesses a highly reversible capacity of 1302 mAh g−1 after the 200th cycle at 0.1 Ag−1 and 964 mAh g−1 after the 500th cycle at 0.5 Ag−1, respectively. The prominent electrochemical performances of the nanocomposite may result from synthetic effects of nitrogen‐doped carbon hollow structures, nanosized MnO and the gradual generation of high‐oxide‐state manganese oxide on nitrogen‐doped carbon hollow spheres during intensive cycles. The aforementioned results also demonstrate that MnO nanocrystals can be well utilized by attaching to nitrogen‐doped carbon hollow spheres, which is a valid way to achieve excellent lithium storage properties for transition metal oxides.

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Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Highly Reversible Lithium Storage of Nitrogen‐Doped Carbon@MnO Hierarchical Hollow Spheres as Advanced Anode Materials

et al. 2019

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High‐Conductivity–Dispersibility Graphene Made by Catalytic Exfoliation of Graphite for Lithium‐Ion Battery

Tao

Xing

et al. 2020

Adv Funct Materials

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Despite the progress made on the production of graphene using liquid‐phase exfoliation methods, the fabrication of graphene with both high conductivity and dispersibility remains challenging. Through catalytic exfoliation of graphite, an effective synthesis method for graphene with large lateral size (≈10 µm), high conductivity (926 S cm–1), and excellent water solubility (≈10 mg mL–1) is reported herein. Such graphene can be used broadly for applications such as lithium ion batteries, where both high conductivity and dispersibility are required. As an example, the synthesis of graphene and lithium‐iron‐phosphate composites is demonstrated, which leads to electrodes with dramatically improved cycling stability and rate performance. Adaption of such material leads to electrodes with volumetric energy density as high as 658.7 and 287.6 W h L–1 under 0.5 and 20 C, respectively, which is significantly higher than that of commercial LiFePO4 (394.7 and 13.5 W h L–1 at 0.5 and 20 C, respectively). This work provides a new method of making high‐conductivity–dispersibility graphene for various applications.

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2D Graphene/MnO Heterostructure with Strongly Stable Interface Enabling High‐Performance Flexible Solid‐State Lithium‐Ion Capacitors

Liu

Zhang

et al. 2022

Adv Funct Materials

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The delicate structural engineering is widely acknowledged as a powerful tool for boosting the electrochemical performance of conversion-type anode materials for lithium storage. Here, a general electrostatic self-assembly strategy is proposed for the in situ synthesis of MnO nano-cabbages on negatively charged reduced graphene oxide (rGO/MnO). The strong interfacial heterostructure and robust lithium storage mechanism related to fast Li + diffusion kinetics and high Li-adsorption ability of rGO/MnO heterostructure are confirmed through operando experimental characterizations and theoretical calculation. Owing to the rapid charge transfer, enriched reaction sites, and stable heterostructure, the as-synthesized rGO/MnO anode delivers a high capacity (860 mAh g −1 at 0.1 A g −1 ), superior rate capability (211 mAh g −1 at 10 A g −1 ), and cycle stability. Notably, the as-assembled flexible pouch cell of activated carbon//rGO/MnO solid-state lithium-ion capacitors (LICs) possesses an exceptional energy density of 194 Wh kg −1 and power density of 40.7 kW kg −1 , both of which are among the highest flexible solid-state LICs reported so far. Further, the LICs possess an ultralong life span with ≈77.8% retention after 10 000 cycles and extraordinary safety, demonstrative of great potential for practical applications.

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Encapsulating MnO nanoparticles within foam-like carbon nanosheet matrix for fast and durable lithium storage

Cited by 104 publications

References 60 publications

Highly Reversible Lithium Storage of Nitrogen‐Doped Carbon@MnO Hierarchical Hollow Spheres as Advanced Anode Materials

Highly Reversible Lithium Storage of Nitrogen‐Doped Carbon@MnO Hierarchical Hollow Spheres as Advanced Anode Materials

High‐Conductivity–Dispersibility Graphene Made by Catalytic Exfoliation of Graphite for Lithium‐Ion Battery

2D Graphene/MnO Heterostructure with Strongly Stable Interface Enabling High‐Performance Flexible Solid‐State Lithium‐Ion Capacitors

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