Integrating Nanoreactor with O–Nb–C Heterointerface Design and Defects Engineering Toward High‐Efficiency and Longevous Sodium Ion Battery (Adv. Energy Mater. 18/2022)

Luo, Dan; Ma, Chuyin; Hou, Junfeng; Zhang, Zhen; Yang, Long; Zhang, Xiaowen; Han, Lu; Liu, Jiabing; Li, Yebao; Zhang, Yongguang; Wang, Xin; Chen, Zhongwei

doi:10.1002/aenm.202270071

Cited by 10 publications

(11 citation statements)

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“…[ 1–3 ] Although, solvated Na + possesses higher ionic conductivity than that of solvated Li + , a reduction potential of Li + (−3.04 V vs SHE (standard hydrogen electrode)) is lower than that of Na + (−2.71 V vs SHE), indicating that SIB has inferior voltage range and energy density. [ 4–6 ] Besides, the huger volume variation coupling with sluggish Na + diffusion in anode materials exists in SIB other than LIB owing to the higher radius of Na + (Na + : 0.102 nm vs Li + : 0.076 nm). [ 3,5–6 ] Moreover, the cathode materials of SIB—polyanionic materials, layered transition metal oxides, and Prussian blue—need a proper anode material to match their high working potential, which is a challenge.…”

Section: Introductionmentioning

confidence: 99%

Combustion Activation Induced Solid‐State Synthesis for N, B Co‐Doped Carbon/Zinc Borate Anode with a Boosting of Sodium Storage Performance

Zhang

Guo

et al. 2023

Advanced Science

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Zinc borates have merits of low voltage polarization and suitable redox potential, but usually suffer from low rate capability and poor cycling life, as an emerging anode candidate for Na+ storage. Here, a new intercalator‐guided synthesis strategy is reported to simultaneously improve rate capability and stabilize cycling life of N, B co‐doped carbon/zinc borates (CBZG). The strategy relies on a uniform dispersion of precursors and simultaneously stimulated combustion activation and solid‐state reactions capable of scalable preparation. The Na+ storage mechanism of CBZG is studied: 1) ex situ XRD and XPS demonstrate two‐step reaction sequence of Na+ storage: Zn6O(OH)(BO3)3+Na++e−↔3ZnO+Zn3B2O6+NaBO2+0.5H2 ①, Zn3B2O6+6Na++6e−↔3Zn+3Na2O+B2O3 ②; reaction ① is irreversible in ether‐based electrolyte while reversible in ester‐based electrolyte. 2) Electrochemical kinetics reveal that ether‐based electrolyte possesses faster Na+ storage than ester‐based electrolyte. The composite demonstrates an excellent capacity of 437.4 mAh g−1 in a half‐cell, together with application potential in full cells (discharge capacity of 440.1 mAh g−1 and stable cycle performance of 2000 cycles at 5 A g−1). These studies will undoubtedly provide an avenue for developing novel synthetic methods of carbon‐based borates and give new insights into the mechanism of Na+ storage in ether‐based electrolyte for the desirable sodium storage.

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Section: Introductionmentioning

confidence: 99%

Combustion Activation Induced Solid‐State Synthesis for N, B Co‐Doped Carbon/Zinc Borate Anode with a Boosting of Sodium Storage Performance

Zhang

Guo

et al. 2023

Advanced Science

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“…The degradation of electrochemical performance under high mass loading is possibly attributed to the poor contact of active materials with conductive agents when the coating thickness of electrode slurry increases, which can be mitigated by changing the conductive agents (e.g., multiwalled carbon nanotubes) or roll‐pressing the electrode. [ 20,53,64 ] The cycling performance at 2 C demonstrates good stability of the electrode under 4.46 mg cm −2 (Figure S18b, Supporting Information). Overall, the Bi 0.67 NbS 2 anode exhibits impressive rate and cycling performance, even under high mass loadings.…”

Section: Resultsmentioning

confidence: 99%

Quasi‐Topological Intercalation Mechanism of Bi_0.67NbS₂ Enabling 100 C Fast‐Charging for Sodium‐Ion Batteries

et al. 2023

Advanced Energy Materials

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Alloying-type bismuth with high volumetric capacity has emerged as a promising anode for sodium-ion batteries but suffers from large volume expansion and continuous pulverization. Herein, a coordination constraint strategy is proposed, that is, chemically confining atomic Bi in an intercalation host framework via reconstruction-favorable linear coordination bonds, enabling a novel quasi-topological intercalation mechanism. Specifically, micron-sized Bi 0.67 NbS 2 is synthesized, in which the Bi atom is linearly coordinated with two S atoms in the interlayer of NbS 2 . The robust Nb−S host framework provides fast ion/electron diffusion channels and buffers the volume expansion of Na + insertion, endowing Bi 0.67 NbS 2 with a lower energy barrier (0.141 vs. 0.504 eV of Bi). In situ and ex situ characterizations reveal that Bi atom alloys with Na + via a solid-solution process and is constrained by the reconstructed Bi−S bonds after dealloying, realizing complete recovery of crystalline Bi 0.67 NbS 2 phase to avoid the migration and aggregation of atomic Bi. Accordingly, the Bi 0.67 NbS 2 anode delivers a reversible capacity of 325 mAh g −1 at 1 C and an extraordinary ultrahigh-rate stability of 226 mAh g −1 at 100 C over 25 000 cycles. The proposed quasi-topological intercalation mechanism induced by coordinated mode modulation is expected to be be conducive to the practical electrode design for fast-charging batteries.

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“…The distinct peaks at 1.6, 2.5 and 3.6 Å correspond to Nb−O and Nb−Nb atomic pairs, respectively (Figure 2i). A strengthened peak locates at 2.4 Å can be ascribed to C−O−Nb atomic pairs in Gr@10‐Nb 2 O 5 , suggesting that this heterointerface has more stable structure [36] …”

Section: Resultsmentioning

confidence: 99%

Graphite‐Based Composite Anodes with C−O−Nb Heterointerfaces Enable Fast Lithium Storage

et al. 2023

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To better satisfy the increasing demands for electric vehicles, it is crucial to develop fast-charging lithium-ion batteries (LIBs). However, the fast-charging capability of commercial graphite anodes is limited by the sluggish Li + insertion kinetics. Herein, we report a synergistic engineering of uniform nano-sized T-Nb 2 O 5 particles on graphite (Gr@Nb 2 O 5 ) with CÀ OÀ Nb heterointerfaces, which prevents the growth and aggregation of T-Nb 2 O 5 nanoparticles. Through detailed theoretical calculations and pair distribution function analysis, the stable existence of the heterointerfaces is proved, which can accelerate the electron/ion transport. These heterointerfaces endow Gr@Nb 2 O 5 anodes with high ionic conductivity and excellent structural stability. Consequently, Gr@10-Nb 2 O 5 anode, where the mass ratio of T-Nb 2 O 5 /graphite = 10/100, exhibits excellent cyclic stability and incredible rate capabilities, with 100.5 mAh g À 1 after 10000 stable cycles at an ultrahigh rate of 20 C. In addition, the synergistic Li + storage mechanism is revealed by systematic electrochemical characterizations and in situ X-ray diffraction. This work offers new insights to the reasonable design of fastcharging graphite-based anodes for the next generation of LIBs.

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Integrating Nanoreactor with O–Nb–C Heterointerface Design and Defects Engineering Toward High‐Efficiency and Longevous Sodium Ion Battery (Adv. Energy Mater. 18/2022)

Cited by 10 publications

References 0 publications

Combustion Activation Induced Solid‐State Synthesis for N, B Co‐Doped Carbon/Zinc Borate Anode with a Boosting of Sodium Storage Performance

Combustion Activation Induced Solid‐State Synthesis for N, B Co‐Doped Carbon/Zinc Borate Anode with a Boosting of Sodium Storage Performance

Quasi‐Topological Intercalation Mechanism of Bi_0.67NbS₂ Enabling 100 C Fast‐Charging for Sodium‐Ion Batteries

Graphite‐Based Composite Anodes with C−O−Nb Heterointerfaces Enable Fast Lithium Storage

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Integrating Nanoreactor with O–Nb–C Heterointerface Design and Defects Engineering Toward High‐Efficiency and Longevous Sodium Ion Battery (Adv. Energy Mater. 18/2022)

Cited by 10 publications

References 0 publications

Combustion Activation Induced Solid‐State Synthesis for N, B Co‐Doped Carbon/Zinc Borate Anode with a Boosting of Sodium Storage Performance

Combustion Activation Induced Solid‐State Synthesis for N, B Co‐Doped Carbon/Zinc Borate Anode with a Boosting of Sodium Storage Performance

Quasi‐Topological Intercalation Mechanism of Bi0.67NbS2 Enabling 100 C Fast‐Charging for Sodium‐Ion Batteries

Graphite‐Based Composite Anodes with C−O−Nb Heterointerfaces Enable Fast Lithium Storage

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Quasi‐Topological Intercalation Mechanism of Bi_0.67NbS₂ Enabling 100 C Fast‐Charging for Sodium‐Ion Batteries