Crystallographic engineering to reduce diffusion barrier for enhanced intercalation pseudocapacitance of TiNb2O7 in fast-charging batteries

Zhang, Yan; Kang, Cong; Zhao, Wei; Sun, Bo; Xiao, Xiangjun; Huo, Hua; Ma, Yulin; Zuo, Pengjian; Lou, Shuaifeng; Yin, Geping

doi:10.1016/j.ensm.2022.01.061

Cited by 46 publications

(24 citation statements)

References 45 publications

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“…When the number of vacancies reaches a certain level, it will cause an unstable electron distribution and ruin the framework of Zrdoped TNO NSs finally. 26 Herein, it was noticed that Zr 0.10 -TNO NSs can only afford a reversible capacity of 123 mA h/g after 1000 cycles at 5 C, approximate to the discharge capacity of the undoped sample (TNO NSs: 120 mA h/g). EIS was used to evaluate the kinetic parameter of the TNO/ Li half-cell system.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…In order to relieve the issues suffered by bulk TiNb 2 O 7 , various strategies have been tried, such as introducing an oxygen vacancy, − regulating the morphology, ,− doping with alien ions, − etc. Oxygen vacancy is an intrinsic defect which can trigger lattice distortion and electron concentration improvement .…”

Section: Introductionmentioning

confidence: 99%

“…Elements’ doping differs from morphology regulating in modification mechanism; the former can not only introduce extra energy bands to reduce the band gap but also increase the crystal lattice parameter to facilitate ion migration. From previous literature, various dopants have been incorporated into bulk TNO, including Tb 4+ , V 5+ , W 6+ , and La 3+ , and the modified electrode materials displayed bigger Li + diffusion coefficients. Taking into account the structural distortion after doping, the ion radius of heteroatoms should be slightly larger than the Ti 4+ ion (0.53 Å) and Nb 5+ ion (0.69 Å).…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Energy Storage Performance of Zr-Doped TiNb₂O₇ Nanospheres Prepared by the Hydrolytic Method

Cai

et al. 2023

ACS Sustainable Chem. Eng.

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The use of TiNb2O7 (TNO) as an anode material for Li-ion battery is attracting tremendous attention because of its stable structure and high theoretical capacity. However, the inherent poor electronic conductivity and ionic conductivity restrict its practical application. Herein, we designed and prepared zirconium-doped TiNb2O7 nanospheres (Zr x -TNO NSs, x = 0, 0.05, 0.010) with pores through a simple hydrolysis method to adjust the lattice spacing and electron distribution. The nanosphere-structured electron materials with pores can not only prevent aggregation of active materials but also provide more channels for Li+ and electrons’ transportation. Meanwhile, X-ray diffraction coupled with high-resolution transmission electron microscopy results verified the crystal spacing increasement. The X-ray photoelectron spectrum exhibited partial reduction of metal atoms. As a result, Zr0.05-TNO NSs showed improved cycling stability in the half cell (i.e., delivers a reversible capacity of 170 mA h/g at 5 C after 1000 cycles). It also showed excellent performance in the rate capabilities of 260.0 and 177.8 mA h/g at 0.5 and 10 C, making it highly competitive for quick-charging lithium-ion batteries.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhanced Energy Storage Performance of Zr-Doped TiNb₂O₇ Nanospheres Prepared by the Hydrolytic Method

Cai

et al. 2023

ACS Sustainable Chem. Eng.

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“…Furthermore, it displays unsatisfactory capacity at high current density due to its low Li ion diffusion coefficient and the formation of solid electrolyte interphase (SEI) on its surfaces. [5][6][7][8] Typical insertion-type anode materials, such as Li4Ti5O12, [9][10] TiNb2O7, [11][12] orthorhombic Nb2O5 [13][14][15] are investigated extensively because of their better capacity retention than convention-and alloy-type ones. Among them, orthorhombic Nb2O5 (T-Nb2O5) has shown excellent lithium ions pseudocapacitive in nonaqueous electrolytes since the empty octahedral sites between (001) planes offer natural tunnels for lithium ion transport.…”

Section: Introductionmentioning

confidence: 99%

2D Nb2O5@2D Metallic RuO2 Heterostructures as Highly Reversible Anode Materials for Lithium-ion Batteries

Yu¹

2022

Enlab

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Constructing two-dimensional (2D) heterostructured materials by stacking different 2D materials could combine the merits of the individual building blocks while getting rid of the associated shortcomings. Orthorhombic Nb2O5(T-Nb2O5) is one of the greatly promising candidates for durable and safety anode for Li-ion batteries (LIBs), but it usually exhibits poor electrochemical performance due to the low electronic conductivity. Herein, we realize excellent lithium storage performance of T-Nb2O5 by designing 2D Nb2O5@2D metallic RuO2 heterostructures (Nb2O5@RuO2). The presence of 2D metallic RuO2 leads to enhanced electronic conductivity. The 2D Nb2O5@RuO2 heterostructures possess very short diffusion length of ions/electrons, easy penetration of liquid electrolyte, and high conductivity transport of electrons through the 2D metallic RuO2 to 2D Nb2O5. The Nb2O5@RuO2 delivers remarkable rate performance (133 mAh g-1 and 106 mAh g-1 at 50 C and 100 C) and excellent long-life capacity (97 mAh g-1 after 10000 cycles at 50 C). Moreover, Nb2O5@RuO2//LiFePO4 full batteries also display high rate capability of 140 mAh g-1 and 90 mAh g-1 at 20 C and 50 C, respectively. Theoretical calculation results show that the 2D Nb2O5@RuO2 heterostructures possess more large adsorption ability for Li+ than that of Nb2O5 , indicating an excellent lithium storage performance.

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“…Among them, transition metal oxides (TMOs) as anodes usually exhibit much higher theoretical specific capacities than commercial graphite-based materials. [20] As is well-known, TMOs contain two main types: the one type is binary TMOs such as Co 3 O 4 , [21] Fe 3 O 4 [22] and so on, and the another one is ternary TMOs represented by TiNb 2 O 7 , [23] ZnCo 2 O 4 , [24] Co 2 VO 4 . [25] Among various TMOs, cobalt-based oxides with spinal structures, such as Co 3 O 4, [26] ZnCo 2 O 4 , [27] CuCo 2 O 4 [28] and so on, have been extensively explored as potential alternative anodes due to their high theoretical capacities.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances of ZnCo₂O₄‐based Anode Materials for Li‐ion Batteries

Han

Zou

Wei

2022

Chemistry An Asian Journal

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ZnCo2O4 has been attracted wide research attention as a promising anode material for lithium‐ion batteries (LIBs) in recent years based on its high theoretical specific capacity, low toxicity as well as stable chemical properties. However, the further large‐scale application of pristine ZnCo2O4 anode have been impeded because of its undesirable Li+ ion conductivity, low electronic conductivity, and finite stability of electrolytes at high potentials. Recently, optimizing the micro/nano structure, modification with carbonaceous materials, incorporation with metal oxides and constructing a binder‐free structure on conductive substrate for ZnCo2O4‐based materials have been verified as promising effective routes for solving the above problems. In this review, the recent advances in underlying reaction mechanisms, synthetic methods and strategies for improving the performance of ZnCo2O4 anodes are comprehensively summarized. The factors affecting the electrochemical properties of ZnCo2O4‐based materials are mainly discussed, and paths to promote the specific capacity and cyclic stability are proposed. Finally, several insights into the future developments, challenges, and prospects of ZnCo2O4‐based anode materials of LIBs are proposed.

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Crystallographic engineering to reduce diffusion barrier for enhanced intercalation pseudocapacitance of TiNb2O7 in fast-charging batteries

Cited by 46 publications

References 45 publications

Enhanced Energy Storage Performance of Zr-Doped TiNb₂O₇ Nanospheres Prepared by the Hydrolytic Method

Enhanced Energy Storage Performance of Zr-Doped TiNb₂O₇ Nanospheres Prepared by the Hydrolytic Method

2D Nb2O5@2D Metallic RuO2 Heterostructures as Highly Reversible Anode Materials for Lithium-ion Batteries

Recent Advances of ZnCo₂O₄‐based Anode Materials for Li‐ion Batteries

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Crystallographic engineering to reduce diffusion barrier for enhanced intercalation pseudocapacitance of TiNb2O7 in fast-charging batteries

Cited by 46 publications

References 45 publications

Enhanced Energy Storage Performance of Zr-Doped TiNb2O7 Nanospheres Prepared by the Hydrolytic Method

Enhanced Energy Storage Performance of Zr-Doped TiNb2O7 Nanospheres Prepared by the Hydrolytic Method

2D Nb2O5@2D Metallic RuO2 Heterostructures as Highly Reversible Anode Materials for Lithium-ion Batteries

Recent Advances of ZnCo2O4‐based Anode Materials for Li‐ion Batteries

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Product

Resources

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Enhanced Energy Storage Performance of Zr-Doped TiNb₂O₇ Nanospheres Prepared by the Hydrolytic Method

Enhanced Energy Storage Performance of Zr-Doped TiNb₂O₇ Nanospheres Prepared by the Hydrolytic Method

Recent Advances of ZnCo₂O₄‐based Anode Materials for Li‐ion Batteries