2D Titania–Carbon Superlattices Vertically Encapsulated in 3D Hollow Carbon Nanospheres Embedded with 0D TiO<sub>2</sub> Quantum Dots for Exceptional Sodium‐Ion Storage

Xia, Qingbing; Lin, Zeheng; Lai, Wei‐Hong; Wang, Yongfei; Ma, Cheng; Yan, Zichao; Gu, Qinfen; Wei, Weifeng; Wang, Jiazhao; Zhang, Zhiqiang; Liu, Huan; Dou, Shi Xue; Chou, Shulei

doi:10.1002/anie.201907189

Cited by 53 publications

(22 citation statements)

References 34 publications

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“…[6] Nevertheless, it has an inherent theoretical specific capacity of only 175 mAh g À 1 , which cannot meet the demand for high energy density. Although alternative anode materials, such as metal oxides, [7][8][9] sulfides, [10][11][12] and silicon-based materials have been exploited, [13][14][15] most of them inevitably undergo a large volume expansion and unsatisfactory cycling stability.…”

Section: Introductionmentioning

confidence: 99%

Encapsulating Oxygen‐Deficient TiNb₂₄O₆₂ Microspheres by N‐Doped Carbon Nanolayer Boosts Capacity and Stability of Lithium‐Ion Battery

Jiang

Nie

et al. 2020

Batteries & Supercaps

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Most of the insertion anode materials are approaching their specific capacity limitations. TiNb 24 O 62 , combining the merits of high theoretical capacity, large working potential and excellent safety, is a promising candidate for lithium-ion batteries (LIBs). However, its poor intrinsic conductivity and relatively sluggish reaction kinetics hinder its wide applications. Herein, we encapsulate the oxygen-deficient TiNb 24 O 62 microspheres by highly conductive N-doped carbon nanolayer (DTNO@NC), where TiNb 24 O 62 is purposely made to exhibit oxygen deficiency, by aerosol spray followed by co-carbonization of the electronically coupled polydopamine (PDA) coating layer. The oxygen-deficient engineering for TiNb 24 O 62 improves the intrinsic conductivity and active sites, while the PDA derived Ndoped carbon coating layer not only stabilizes the interface between the electrode and electrolyte, but also further enhances the overall conductivity. As a result, the as-fabricated DTNO@NC electrode delivers excellent Li + ion storage capacity (270 mAh g À 1 at 0.1 A g À 1) and superior cycling lifespan (capacity retention of 90 % after 1000 cycles). This work demonstrates the effectiveness of integrating an oxygen-deficient structure of intercalation-type anode material with a carbon encapsulating nanolayer in enabling the overall energy storage performance.

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Section: Introductionmentioning

confidence: 99%

Encapsulating Oxygen‐Deficient TiNb₂₄O₆₂ Microspheres by N‐Doped Carbon Nanolayer Boosts Capacity and Stability of Lithium‐Ion Battery

Jiang

Nie

et al. 2020

Batteries & Supercaps

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“…During the whole sodiation/desodiation process, the broad diffraction peak keeps nearly unvaried in its theta angle, intensity, and appearance. [33] This result mirrors excellent structural stability of FePO 4 YSNSs, endowing FePO 4 YSNSs with ultralong cycle life.…”

Section: àmentioning

confidence: 66%

A Yolk–Shell‐Structured FePO₄ Cathode for High‐Rate and Long‐Cycling Sodium‐Ion Batteries

et al. 2020

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Amorphous iron phosphate (FePO4) has attracted enormous attention as a promising cathode material for sodium‐ion batteries (SIBs) because of its high theoretical specific capacity and superior electrochemical reversibility. Nevertheless, the low rate performance and rapid capacity decline seriously hamper its implementation in SIBs. Herein, we demonstrate a sagacious multi‐step templating approach to skillfully craft amorphous FePO4 yolk–shell nanospheres with mesoporous nanoyolks supported inside the robust porous outer nanoshells. Their unique architecture and large surface area enable these amorphous FePO4 yolk–shell nanospheres to manifest remarkable sodium storage properties with high reversible capacity, outstanding rate performance, and ultralong cycle life.

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“…Oxides are proven to be a promising class of anode materials in LIBs and SIBs [92–95] . For the application of PIBs as an alternative energy‐storage device for LIBs, it is necessary to study the potassium‐storage performance of oxides.…”

Section: Anode Materialsmentioning

confidence: 99%

Post‐Lithium‐Ion Battery Era: Recent Advances in Rechargeable Potassium‐Ion Batteries

Wang

Ang

Yang

et al. 2020

Chemistry A European J

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Lithium shortage and the growing demand for electricity storage has encouraged researchers to look for new alternative energy‐storage materials. Due to abundant potassium resources, similar redox potential to lithium metal, and low cost, potassium‐ion batteries (PIBs), as one of the promising alternatives, have been applied in energy‐storage research recently. However, PIBs do not have adequate competition in their electrochemical efficiency because the molar volume of potassium ions is higher than those in lithium and sodium ions. Therefore, for better application and development of PIBs, finding suitable anode and cathode materials is currently the most important task. The latest developments in electrode materials for PIBs have been outlined in depth in this review. It focuses on the structural design and synthetic methods for novel electrode materials, ingenious optimization and tuning strategies, and explains the intrinsic reaction mechanism. The effects of organic electrolytes and aqueous electrolytes on battery systems are compared and clarified. Finally, theoretical and viable insights are given to the challenges posed by the creation and practical application of PIBs in the future.

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2D Titania–Carbon Superlattices Vertically Encapsulated in 3D Hollow Carbon Nanospheres Embedded with 0D TiO₂ Quantum Dots for Exceptional Sodium‐Ion Storage

Cited by 53 publications

References 34 publications

Encapsulating Oxygen‐Deficient TiNb₂₄O₆₂ Microspheres by N‐Doped Carbon Nanolayer Boosts Capacity and Stability of Lithium‐Ion Battery

Encapsulating Oxygen‐Deficient TiNb₂₄O₆₂ Microspheres by N‐Doped Carbon Nanolayer Boosts Capacity and Stability of Lithium‐Ion Battery

A Yolk–Shell‐Structured FePO₄ Cathode for High‐Rate and Long‐Cycling Sodium‐Ion Batteries

Post‐Lithium‐Ion Battery Era: Recent Advances in Rechargeable Potassium‐Ion Batteries

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2D Titania–Carbon Superlattices Vertically Encapsulated in 3D Hollow Carbon Nanospheres Embedded with 0D TiO2 Quantum Dots for Exceptional Sodium‐Ion Storage

Cited by 53 publications

References 34 publications

Encapsulating Oxygen‐Deficient TiNb24O62 Microspheres by N‐Doped Carbon Nanolayer Boosts Capacity and Stability of Lithium‐Ion Battery

Encapsulating Oxygen‐Deficient TiNb24O62 Microspheres by N‐Doped Carbon Nanolayer Boosts Capacity and Stability of Lithium‐Ion Battery

A Yolk–Shell‐Structured FePO4 Cathode for High‐Rate and Long‐Cycling Sodium‐Ion Batteries

Post‐Lithium‐Ion Battery Era: Recent Advances in Rechargeable Potassium‐Ion Batteries

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2D Titania–Carbon Superlattices Vertically Encapsulated in 3D Hollow Carbon Nanospheres Embedded with 0D TiO₂ Quantum Dots for Exceptional Sodium‐Ion Storage

Encapsulating Oxygen‐Deficient TiNb₂₄O₆₂ Microspheres by N‐Doped Carbon Nanolayer Boosts Capacity and Stability of Lithium‐Ion Battery

Encapsulating Oxygen‐Deficient TiNb₂₄O₆₂ Microspheres by N‐Doped Carbon Nanolayer Boosts Capacity and Stability of Lithium‐Ion Battery

A Yolk–Shell‐Structured FePO₄ Cathode for High‐Rate and Long‐Cycling Sodium‐Ion Batteries