ACS Applied Nano Materials
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2022
·
IF 6.14
Yu Niu,Lingling Xie,Tao Zhou,Jing Xu,Youchi Ding,Qing Han,Xuejing Qiu,Yongmei Xiao,Yongxia Miao,Limin Zhu,Xiaoyu Cao
In this work, nano LiV3O8(LVO) was synthesized using the rheological phase reaction method. Subsequently, after ultrasonic and heat treatment at 300 °C, the nano LVO Ut-300 was obtained and performed as cathode material in Na-ion batteries for the first time. Brunauer–Emmett–Teller analysis indicated that the specific area increased after ultrasonic treatment, which was conducive to the shuttling of sodium ions and enhancement of the electrochemical performance. The X-ray diffraction patterns displayed stable nano LVO Ut-300 material structure and larger interlayer spacing, and SEM and TEM performed more regular morphology. After the electrochemical tests, the nano LVO Ut-300 cathode delivered a high discharge capacity of 153.8 mA h g–1 in the voltage range of 1.8–4.0 V at 30 mA g–1. Meanwhile, the storage mechanism of Na+ was further explored by XPS, and kinetics characteristics of LVO/Na cells were revealed by pseudocapacitance analysis and galvanostatic intermittent titration technique (GITT) tests. In summary, nano LVO was processed by the ultrasonic method followed by subsequent heat treatment, which could effectively improve the electrochemical behavior of LiV3O8 as cathode materials of secondary Na-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2016
·
IF 6.333
Zong-Kai Wang,Jie Shu,Qian-Cheng Zhu,Bo-Yu Cao,Hui Chen,Xue-Yan Wu,Bart M. Bartlett,Kai-Xue Wang,Jie-Sheng Chen
A novel graphene-nanosheet-wrapped LiV 3 O 8 nanoflakes (GNS/LiV 3 O 8 ) nanocomposite has been generated by sheet-to-sheet self-assembly of ultrathin LiV 3 O 8 nanoflakes and graphene nanosheets. When used as a cathode material for lithium-ion batteries, the GNS/LiV 3 O 8 nanocomposites show superior rate capability and excellent cycling stability. Discharge capacities of approximately 328.7, 305.3, 276.9, 251.4, and 209.3 mAh g −1 are achieved at current densities of 2, 5, 10, 20, and 50C, respectively. A reversible capacity of approximately 287.2 mAh g −1 is retained even after 100 cycles at 1.0 A g −1 (about 3C), approximately 88.3% of the initial discharge capacity. It is believed that the unique nanoflake morphology of LiV 3 O 8 and the surface modification by graphene nanosheets contribute to the improved kinetics of lithium-ion diffusion, excellent structural stability and superior electrochemical performance. The structural evolution of LiV 3 O 8 species upon charging and discharging is investigated by in situ X-ray diffraction technique. Anisotropic lattice expansion is found occurring along a , b and c axes upon the insertion of lithium ions into the crystal structure of LiV 3 O 8 .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2024
·
IF 27.4
Menghua Wu,Chuan Shi,Junwei Yang,Yu Zong,Yu Chen,Zhiguo Ren,Yuanxin Zhao,Zhao Li,Wei Zhang,Liyu Wang,Xinliang Huang,Wen Wen,Xiaolong Li,Xin Ning,Xiaochuan Ren,Daming Zhu
Resolving the sluggish transport kinetics of divalent Zn 2+ in the cathode lattice and improving mass-loading performance are crucial for advancing the zinc-ion batteries (AZIBs) application. Herein, PEO-LiV 3 O 8 superlattice nanosheets (PEO-LVO) with expanded interlayer spacing (1.16 nm) are fabricated to provide a high-rate, stable lifetime, and large mass-loading cathode. The steady in-plane expansion without shrinkage after the first cycle, but reversible H + /Zn 2+ co-insertion in PEO-LVO are demonstrated by operando synchrotron X-ray diffraction and ex situ characterizations. Moreover, the large capacity of PEO-LVO is traced back to the optimized Zn 2+ insertion chemistry with increased Zn 2+ storage ratio, which is facilitated by the interlayer PEO in lowering the Zn 2+ diffusion barrier and increased number of active sites from additional interfaces, as anticipated by density functional theory. Due to the optimized ion insertion resulting in stalled interfacial byproducts and rapid kinetics, PEO-LVO achieves excellent high mass-loading performance (areal capacity up to 6.18 mAh cm −2 for freestanding electrode with 24 mg cm −2 mass-loading and 2.8 mAh cm −2 at 130 mA cm −2 for conventional electrode with 27 mg cm −2 mass-loading). As a proof-of-concept, the flexible all-solid-state fiber-shaped AZIBs with high mass-loading woven into a fabric can power an electronic watch, highlighting the application potential of PEO-LVO cathode.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IONICS
·
2019
·Vol. 25
·期 10
·4567-4576
·
IF 2.289
Xu Chun-Sheng,Yu Hai-Tao,Guo Chen-Feng,Xie Ying,Ren Ning,Yi Ting-Feng,Zhang Guo-Xu
To improve the stability and performance of the cathode materials, an ionic conductor layer was coated successfully on the surface of Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 (LMNC) microspheres. The structural analysis confirmed that LiV 3 O 8 coating did not change the basic structure of LMNC, and all obtained materials are solid solutions with a good-layered structure and a good crystallinity. The microscopy measurement showed that the thickness of the coating layer for the LV-3 sample is about 2.5 nm. This appropriate layer is helpful for improving the surface stability of LMNC and the diffusion of lithium, leading to an obvious enhancement of the electrochemical performance. Our result confirmed that the average discharge specific capacities for LV-3 sample at 0.1 C, 0.2 C, 0.5 C, 1 C, and 3 C are respectively 265.9, 219.1, 188.0, 156.3, and 121.5 mAh g −1 , which are much larger than the values of other samples. After 50 cycles at a 1 C rate, the capacity retentions for different samples are 60.7%, 74.0%, 87.6%, and 70.4%, indicating that LV-3 sample exhibits the best performance. Furthermore, EIS measurements showed that the diffusion coefficient for LV-3 sample is calculated to be 1.26 × 10 −15 cm 2 s −1 , which is also the largest value among all considered samples. Our experiments identified that coating an ionic conductive layer on the cathode material surface will significantly improve their rate capacity and cycling stability.
研究领域:
材料科学
·
电化学
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能源存储
·
无机化学
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固态离子学
✓ 已验证
DOI
高影响因子
Small Methods
·
2026
·
IF 8.7
Wei Zheng,Mutian Zhang,Junjiang Fan,Xiang Liu,Miaoxi Guo,Li Yang,Peigen Zhang,Guobing Ying,ZhengMing Sun
Aqueous ammonium-ion batteries offer safe and low-cost energy storage but are limited by the lack of electrode materials combining high capacity, fast kinetics, and long-term stability. Herein, MXene-derived LiV 3 O 8 nanorods are synthesized via an in situ thermal conversion strategy as high-performance anodes. The open 1D architecture enables efficient ion transport, delivering a high capacity of 185 mAh g −1 at 1 A g −1 , excellent rate capability of 93 mAh g −1 at 10 A g −1 , and outstanding cycling durability. A dynamic storage mechanism involving reversible H + /NH 4 + co-intercalation and ion-exchange-driven phase transition to NH 4 V 3 O 8 ·H 2 O is revealed, inducing a self-adaptive nanorod-to-nanowire structural evolution that continuously enhances ion transport and active surface area. Density functional theory calculations further reveal ultralow ammonium-ion diffusion barriers along the V–O chain direction and strong adsorption stabilized by hydrogen-bond interactions, providing atomic-level insight into the fast kinetics. Full cells with δ-MnO 2 cathodes exhibit high voltage output and long-term stability, demonstrating practical feasibility.
✓ 已验证
DOI
PubMed
高影响因子
Nanomaterials
·
2021
·Vol. 11
·期 6
·1429
·
IF 5.076
Qiang Pang,Xiangyu Yu,Shijing Zhang,Wei He,Siyu Yang,Yao Fu,Ying Tian,Mingming Xing,Xixian Luo
Aqueous zinc-ion batteries (AZIBs) are promising candidates for large-scale energy storage because of their low cost and high safety. However, their practical applications are impeded by low energy density and short service life. Here, an aqueous Zn2+/Li+hybrid-ion battery is fabricated using the LiV3O8nanorods as the cathode, metallic Zn as the anode, and 3 M Zn(OTf)2+ 0.5 M LiOTf aqueous solution as the electrolyte. Compared with the batteries using pure 3 M Zn(OTf)2electrolyte, the cycle performance of the hybrid-ion battery is significantly improved. After 4000 cycles at 5 A g1, the remaining capacity is 163.9 mA h g−1with impressive capacity retention of 87.0%. Ex-situ XRD, ex-situ XPS, and SEM tests demonstrate that the hybrid electrolyte can inhibit the formation of the irreversible Zn3(OH)2V2O7·2H2O by-product and restrict Zn dendrite growth during cycling, thereby improving the cycle performance of the batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2013
·
IF 4.675
S. Huang,J.P. Tu,X.M. Jian,Y. Lu,S.J. Shi,X.Y. Zhao,T.Q. Wang,X.L. Wang,C.D. Gu
Surface modified-LiV 3 O 8 cathode materials with Al 2 O 3 are successfully synthesized via a facile thermolysis process. The 0.5 wt.% Al 2 O 3 -coated LiV 3 O 8 exhibits an enhanced cyclic stability at various charge–discharge current densities. At a current density of 100 mA g −1 , it delivers an initial specific discharge capacity of 283.1 mAh g −1 between 2.0 and 4.0 V. Moreover, high capacities of 139.4 and 118.5 mAh g −1 are obtained at the 100th cycle at current densities of 2000 and 3000 mA g −1 , respectively. The improved electrochemical performance is attributed to the Al 2 O 3 coating, which can hinder the irreversible phase transformation and act as a protective layer to prevent the active material from direct contact with electrolyte. Furthermore, the formation of a Li–V–Al–O solid solution at the LiV 3 O 8 /Al 2 O 3 interface provides a fast Li + diffusion path which is of benefit to the electrochemical behaviors.
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 9
·期 3
·1845-1858
·
IF 11.301
Peng Ge,Shaohui Yuan,Wenqing Zhao,Limin Zhang,Yue Yang,Lingling Xie,Limin Zhu,Xiaoyu Cao
Due to its high theoretical capacity (∼280 mA h g−1), lithium vanadium oxide (LiV3O8) is considered a promising electrode material for meeting the demands for a longer battery life. However, it still suffers from an inferior cycling stability and rate properties. Benefitting from the unique traits of rare earth metal La, La-doping was introduced to V-sites, leading to an expansion of the lattice volume and reduced particle size, and bringing about more oxygen defects for fast ion redox reactions. The considerable discharge capacity of optimized La-doped LiV3O8 could reach up to 308 mA h g−1, and the capacity could be kept at 252 mA h g−1 after numerous loops. Supported by a detailed analysis of the capacity curves, an improved redox activity of V5+ was strongly demonstrated. Moreover, compared to the basic materials, an increasing rate capacity located in the low potential range was detected, ascribed to the existence of an oxygen vacancy, enabling a reduction in the energy barrier and a broadening of the energy distribution. Interestingly, La-doping could ultimately improve the capacity and is thus worth further exploration, particularly for the design of advanced cathodic materials.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）