Highly Reversible and Durable Na Storage in Niobium Pentoxide through Optimizing Structure, Composition, and Nanoarchitecture

Ni, Jiangfeng; Wang, Wencong; Wu, Chao; Liang, Haichen; Maier, Joachim; Yu, Yan; Li, Liang

doi:10.1002/adma.201605607

Cited by 122 publications

(59 citation statements)

References 46 publications

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“…[38,41] However, NP-10 shows excellent performance at all rates, the best among all the samples investigated. [64,65] After the first cycle, the CVs show reversible broad cathodic and anodic peaks, as a result of the reaction Nb 2 O 5 + xNa + + xe − ↔ Na x Nb 2 O 5 . When the rate is reversed back to 0.5 C, the initial capacity is restored, demonstrating the excellent reversibility of the Li + insertion/deinsertion process occurring in the NP-10 electrode.…”

Section: Resultsmentioning

confidence: 99%

Exploiting the Condensation Reactions of Acetophenone to Engineer Carbon‐Encapsulated Nb₂O₅ Nanocrystals for High‐Performance Li and Na Energy Storage Systems

Han

Russo

Goubard‐Bretesché

et al. 2019

Advanced Energy Materials

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Energy storage technologies such as lithium-ion batteries (LIBs) and electrochemical capacitors (ECs) are currently the focus of intense research for applications that include electronic devices and electric vehicles. [1][2][3] Owing to the different energy storage mechanisms, batteries are able to deliver high energy density, while ECs have comparatively lower energy density but higher power density and longer cycling stability. [4][5][6] The expected technological advancements and increase in global energy consumption over the next decades will require energy storage devices with higher power densities, large capacities, and longer lifespans, compared to those currently available.Nonaqueous hybrid supercapacitors (HSCs), which generally consist of a battery-type anode (e.g., LIB) and an EC cathode in order to combine the advantages of both system storage mechanisms, are promising energy storage systems to meet future energy demands. [7][8][9] HSCs cathode materials are typically high surface area carbons, with the charge stored at the interface between the electrode and liquid electrolyte, and show high power density, high rate capability, and cycling stability. [10,11] At the battery-type anode, charges are usually stored through a Li + intercalation mechanism. [12] Therefore, the rate performance of HSCs is limited by the slow kinetics of lithium diffusion in the solid, as the surface adsorption-desorption processes at the cathode are considerably faster than the Faradaic reactions that take place at the anode. [13,14] Several materials, including Nb 2 O 5 , [15][16][17] Li 4 Ti 5 O 12 , [18] TiO 2 , [19] V 2 O 5 , [20] VN, [21] and MnO, [22] are being investigated as anodes to fabricate HSCs. In particular, Nb 2 O 5 shows promise due to its high theoretical specific capacity (≈200 mAh g −1 ), fast Li ions' diffusion, and good cycling stability. [23] Despite the charge storage deriving from the insertion of Li ions into the structure, the electrochemical behavior of Nb 2 O 5 is similar to that of a pseudocapacitive material. This mechanism has been named intercalation pseudocapacitance, and it is characterized by fast Faradaic processes occurring during ion insertion-deinsertion into the host material. [8] It has been demonstrated that the performance of Nb 2 O 5 strongly Efficient synthetic methods to produce high-performance electrode-active materials are crucial for developing energy storage devices for large-scale applications, such as hybrid supercapacitors (HSCs). Here, an effective approach to obtain controllable carbon-encapsulated T-Nb 2 O 5 nanocrystals (NCs) is presented, based on the solvothermal treatment of NbCl 5 in acetophenone. Two separate condensation reactions of acetophenone generate an intimate and homogeneous mixture of Nb 2 O 5 particles and 1,3,5-triphenylbenzene (TPB), which acts as a unique carbon precursor. The electrochemical performance of the resulting composites as anode electrode materials can be tuned by varying the Nb 2 O 5 /TPB ratio. Remarkable performances are achieved fo...

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Section: Resultsmentioning

confidence: 99%

Exploiting the Condensation Reactions of Acetophenone to Engineer Carbon‐Encapsulated Nb₂O₅ Nanocrystals for High‐Performance Li and Na Energy Storage Systems

Han

Russo

Goubard‐Bretesché

et al. 2019

Advanced Energy Materials

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show abstract

“…The areal discharge capacity decreased from 0.742 mA h cm −2 in the second cycle to 0.611 mA h cm −2 in the tenth cycle. [18,[39][40][41][42][43][44][45] Figure S12 The gravimetric specific capacity of CoP@PPy NWs/CP remained at 369 mA h g −1 during long term cycling after 1000 cycles at 1250 mA g −1 . From 7th cycle to 100th cycle, the areal capacity of CoP@PPy NWs/CP declined slightly, from 0.606 to 0.521 mA h cm −2 .…”

Section: Resultsmentioning

confidence: 99%

Bifunctional Conducting Polymer Coated CoP Core–Shell Nanowires on Carbon Paper as a Free‐Standing Anode for Sodium Ion Batteries

Zhang

Yang

et al. 2018

Advanced Energy Materials

113

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This study proposes a conformal surface coating of conducting polymer for protecting 1D nanostructured electrode material, thereby enabling a free‐standing electrode without binder for sodium ion batteries. Here, polypyrrole (PPy), which is one of the representative conducting polymers, encapsulated cobalt phosphide (CoP) nanowires (NWs) grown on carbon paper (CP), finally realizes 1D core–shell CoP@PPy NWs/CP. The CoP core is connected to the PPy shell via strong chemical bonding, which can maintain a Co–PPy framework during charge/discharge. It also possesses bifunctional features that enhances the charge transfer and buffers the volume expansion. Consequently, 1D core–shell CoP@PPy NWs/CP demonstrates superb electrochemical performance, delivering a high areal capacity of 0.521 mA h cm−2 at 0.15 mA cm−2 after 100 cycles, and 0.443 mA h cm−2 at 1.5 mA cm−2 even after 1000 cycles. Even at a high current density of 3 mA cm−2, a significant areal discharge capacity reaching 0.285 mA h cm−2 is still maintained. The outstanding performance of the CoP@PPy NWs/CP free‐standing anode provides not only a novel insight into the modulated volume expansion of anode materials but also one of the most effective strategies for binder‐free and free‐standing electrodes with decent mechanical endurance for future secondary batteries.

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“…25,58 The relative stability of the capacity for subsequent cycles suggests that a stable SEI is formed from both electrolytes, but the capacity is inferior to many recent advanced anodes for SIBs. [59][60][61] One potential route to improve performance is increasing the operating temperature to overcome transport limitations of sodium ion. Figure 4b illustrates the galvanostatic charge-discharge curves at 60…”

Section: Resultsmentioning

confidence: 99%

Enhanced Cycle Performance of Quinone-Based Anodes for Sodium Ion Batteries by Attachment to Ordered Mesoporous Carbon and Use of Ionic Liquid Electrolyte

Gurkan

Qiang

Chen

et al. 2017

J. Electrochem. Soc.

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Sodium ion batteries (SIBs) have emerged as a potential alternative to lithium ion batteries due to their chemical similarities. Key considerations for SIBs include energy storage capacity, lifetime, cost, and safety. Major challenges associated with high performance organic electrodes for rechargeable batteries are their poor electrical conductivity and dissolution of the active material in common electrolytes. The poor conductivity limits the rate performance, while dissolution leads to poor cycle performance and short lifetimes. Here we demonstrate a route to address these challenges in a sodium ion battery for 2,5-disodium-1,4-benzoquinone, Na 2 DBQ (organic active material), through immobilization of the Na 2 DBQ on high surface area ordered mesoporous carbon, OMC, and use of 1-methyl-3-propylpyrrolidinium bis(fluoromethylsulfonyl)imide ionic liquid (IL) electrolyte, NaFSI/[PYR13] [FSI]. These changes increase the rate capability and capacity retention after cycling when compared Na 2 DBQ anodes using standard carbonate electrolytes. At 22 • C, the inclusion of the OMC leads to similar capacities for the IL-and carbonate-electrolytes, but the improved thermal stability of the IL enables safe operation at 60 • C, which more than doubles the discharge capacities due to enhanced ion mobility and charge transfer kinetics. At 60 • C, the capacity retention was 83% for the IL-electrolyte after 300 cycles. For the materials examined here, the use of IL electrolyte does not adversely impact the performance of organic anode sodium-ion batteries and provides advantages with a wider operating temperature range and improved safety when compared to typical carbonate-based electrolytes. The move toward clean energy technologies associated with electrical vehicles and renewable energy production requires energy storage systems that are safe, reliable and economical.1,2 Lithium ion batteries (LIBs) have dominated energy storage solutions for portable devices due to their high energy density (∼200 Wh/kg). 3 The need for improved performance has fueled significant efforts in new electrode materials to enhance the energy density of LIBs. 4,5 However, the growing demands for large-scale energy storage generate questions regarding the future availability and the cost of lithium, which could adversely impact the competitiveness of intermittent energy sources.6-8 Sodium with its orders of magnitude greater natural abundance compared to Li can potentially address these availability and cost concerns, 9 but the larger atomic size (Na + : 4.44 Å 3 and Li + : 1.84 Å 3 ) and higher intrinsic mass per charge of sodium leads to lower theoretical capacity for sodium ion batteries (SIBs) in comparison to LIBs. Challenges for SIBs include improving the reversible insertion electrode materials for Na + for enhanced discharge capacity and cyclability.10 In addition to the active materials for the electrodes, the selection of the electrolyte impacts performance, safety and cost. 11A variety of carbon materials, including ordered mesoporous ca...

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Highly Reversible and Durable Na Storage in Niobium Pentoxide through Optimizing Structure, Composition, and Nanoarchitecture

Cited by 122 publications

References 46 publications

Exploiting the Condensation Reactions of Acetophenone to Engineer Carbon‐Encapsulated Nb₂O₅ Nanocrystals for High‐Performance Li and Na Energy Storage Systems

Exploiting the Condensation Reactions of Acetophenone to Engineer Carbon‐Encapsulated Nb₂O₅ Nanocrystals for High‐Performance Li and Na Energy Storage Systems

Bifunctional Conducting Polymer Coated CoP Core–Shell Nanowires on Carbon Paper as a Free‐Standing Anode for Sodium Ion Batteries

Enhanced Cycle Performance of Quinone-Based Anodes for Sodium Ion Batteries by Attachment to Ordered Mesoporous Carbon and Use of Ionic Liquid Electrolyte

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Highly Reversible and Durable Na Storage in Niobium Pentoxide through Optimizing Structure, Composition, and Nanoarchitecture

Cited by 122 publications

References 46 publications

Exploiting the Condensation Reactions of Acetophenone to Engineer Carbon‐Encapsulated Nb2O5 Nanocrystals for High‐Performance Li and Na Energy Storage Systems

Exploiting the Condensation Reactions of Acetophenone to Engineer Carbon‐Encapsulated Nb2O5 Nanocrystals for High‐Performance Li and Na Energy Storage Systems

Bifunctional Conducting Polymer Coated CoP Core–Shell Nanowires on Carbon Paper as a Free‐Standing Anode for Sodium Ion Batteries

Enhanced Cycle Performance of Quinone-Based Anodes for Sodium Ion Batteries by Attachment to Ordered Mesoporous Carbon and Use of Ionic Liquid Electrolyte

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Exploiting the Condensation Reactions of Acetophenone to Engineer Carbon‐Encapsulated Nb₂O₅ Nanocrystals for High‐Performance Li and Na Energy Storage Systems

Exploiting the Condensation Reactions of Acetophenone to Engineer Carbon‐Encapsulated Nb₂O₅ Nanocrystals for High‐Performance Li and Na Energy Storage Systems