JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 11
·9258-9267
·
IF 2.324
Xu Liang,Xu Guobao,Chen Zhuo,Wei Xiaolin,Cao Juexian,Yang Liwen
NaTi 2 (PO 4 ) 3 (NTP) with NASICON structure has been regarded as a promising material for sodium-ion batteries (SIBs). However, NTP always exhibits poor cycling stability and rate performance due to slow electronic conductivity. In this work, a free-standing 3D nanocomposite constructed by reduced graphene oxide (rGO), thermally-treated protein (TP) and mesoporous NaTi 2 (PO 4 ) 3 nanocrystals (denoted as MNTP-TP@rGO) is reported. The fabrication includes an electrostatic self-assembly, freeze-drying, mechanical pressing and thermal treatment. In the MNTP-TP@rGO nanocomposite, 3D interconnected carbon network of rGO and TP acts as both a support for the anchored well-distributed MNTP nanocrystals and a current collector. When free-standing MNTP-TP@rGO is used directly as anode in coin-type half-cell, it delivers a high-rate capacity (52.8 mAhg −1 at 50C) and robust cycling stability with the capacity retention of 80% after 1000 cycles at 5C. Furthermore, a full Na-ion battery is constructed using Na 3 V 2 (PO 4 ) 3 /C (NVP/C) as a cathode and free-standing MNTP-TP@rGO as an anode and it exhibits a high specific capacity (58 mAhg −1 at 1C) and outstanding cycling stability (98% capacity retention over 100 cycles at 1C). Our results suggest great potential of the free-standing electrode of MNTP-TP@rGO composite in high-performance SIBs.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Jiapin Liu,Yun Huang,Zhixing Zhao,Wenhao Ren,Zhuangzhi Li,Chao Zou,Ling Zhao,Zhaomin Tang,Xing Li,Mingshan Wang,Yuanhua Lin,Haijun Cao
The sodium super ion conductor (NASICON) structure materials are essential for sodium-ion batteries (SIBs) due to their robust crystal structure, excellent ionic conductivity, and flexibility to regulate element and valence. However, the poor electronic conductivity and inferior energy density caused by the nature of these materials have always been obstacles to commercialization. Herein, using yeast as a template to derive NASICON structure Na3MnTi(PO4)3 (NMTP) materials (noted as Yeast@NMTP/C) is presented. The Yeast@NMTP/C material retains the microsphere morphology of the yeast template and not only controls the particle size (around 2 μm) to shorten the Na+ diffusion pathways but also improves the electronic conductivity to optimize the electrochemical kinetics. The Yeast@NMTP/C cathode delivers reversible multielectron redox reactions including Ti4+/3+, Mn3+/2+, and Mn4+/3+ and exhibits a high capacity of 108.5 mAh g–1 with a 79.2% capacity retention after 1000 cycles at a 2C rate. The sodium storage mechanism of Yeast@NMTP/C reveals that the addition of Ti4+/3+ redox plays a key role in improving the Na+ diffusion kinetics, and both solid-solution and two-phase reactions take place during the desodiation and sodiation process. Additionally, the high-rate and long-span cycle performance of Yeast@NMTP/C at 10C is ascribed to contribute to pseudocapacitance.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Yingmin Jin,Xin Zong,Xuebai Zhang,Chaojun Liu,Dong Li,Zhenggang Jia,Gen Li,Xuanguang Zhou,Junhua Wei,Yueping Xiong
Composite solid electrolyte (CSE) consisting of Li + conductive fillers and polymer matrix has become attractive for high energy-density lithium batteries . Current researches focus on the “ceramic in polymer”-type CSE due to the severe agglomeration of ceramic particles. Consequently, the destroyed percolation network impedes the further improvement in ionic conductivity . In this work, we report a novel structural design of ceramic-enriched CSE consisting of three-dimensional (3D) interconnected Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP), polyvinylidene fluoride (PVDF) and LiN(SO 2 ) 2 (CF 3 ) 2 (LiTFSI). The 3D LATP network is constructed through the surface functionalization of LATP particles by polymethyl methacrylate (PMMA). Owing to the intermolecular interaction between PMMA and PVDF, the incorporation of PMMA-coated LATP (denoted as LATP@PMMA) enables the uniform distribution of ceramic phase and generates interconnected LATP network. Noticeably, such an electrolyte maximizes the utilization of inorganic fillers through the facile treatment of zero-dimensional materials, which is comparable to those 3D template-derived fillers. Furthermore, continuous Li + conduction pathways through LATP framework and LATP/PVDF interphase are guaranteed by the enhanced affinity of LATP towards PVDF matrix and the intrinsic Li + complexation capability of PMMA. Remarkable cycling performances of the LiNi 0.5 Co 0.2 Mn 0.3 O 2 /LATP@PMMA-PVDF/Li batteries confirm the feasibility of 3D ceramic-enriched composite electrolyte in the application of solid-state lithium batteries.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 19
·10625-10637
·
IF 14.511
Kun Wang,Xiaobing Huang,Tao Zhou,Dan Sun,Haiyan Wang,Zhi Zhang
The NASICON-type Na4MnV(PO4)3 (NMVP) possesses potential as a cathode material in SIBs, and is known for its stable 3D Na+ superconductive framework, high voltage platform, and relatively low cost and toxicity. Nevertheless, the intrinsic poor electronic conductivity and Jahn–Teller effect from Mn3+ during cycling limit its further application. Herein, to address such issues, a well-designed 3D porous spheroidal Ce3+-doped NMVP@CeO2/C cathode was constructed via a simple spraying drying-assisted route. As proved, the synergistic effect of Ce3+ doping in the crystal framework and CeO2 surface coating was achieved simultaneously, which greatly improved the electronic conductivity, facilitated the ion diffusion transfer and stabilized the crystalline structure. As a result, the as-prepared sample delivered superior discharge performance (50.3 mA h g−1 at 50C) and long circular life (91.0 mA h g−1 after 2000 cycles at 5C with 86.7% capacity retention). Furthermore, the reversible biphasic reaction for cathodes was confirmed by Galvanostatic intermittent titration technique (GITT) and ex situ XRD. The DFT calculation revealed the influence of Ce3+-doping on the crystalline framework and electrochemical properties. Finally, the optimized NMVP cathode also showed great potential for practical utilization through the successful assembly of full cells.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Mengyue Liu,Kexin Wan,Xinmiao Zhang,Mingkun Wang,Dawei Yang,Jishi Wei,Kun Chang,Hongwei Tang
NASICON-type cathodes as promising candidates have attracted more and more attention, and Na 3 V 2 (PO 4 ) 3 is one of the outstanding representatives. In particular, it can tolerate complex interface reaction processes during the Zn 2+ insertion/desertion in the aqueous environment. However, existing three-dimensional channels in the intrinsic Na 3 V 2 (PO 4 ) 3 always hardly play to their advantages as narrow pathways and some other defects. This work has considered both the conductivity and capacity of this vanadium-based NASICON cathode at the same time, where a sodium-rich cathode material Na 3.2 V 1.8 Mn 0.15 Mg 0.05 (PO 4 ) 3 (NVMMP) with Mn 2+ and Mg 2+ dual-substituents has been designed considering the low cost and environmentally friendly characteristics. The synergistic effects introduced by Mn 2+ and Mg 2+ substitution led to a significant increase in the capacity and cycle life of the optimized NVMMP cathode material (with a capacity retention rate of 90.6 % after 2500 cycles at 2 A g −1 ). Furthermore, the reversible storage mechanism of Zn 2+ in NVMMP cathode materials and the theoretical study of such synergistic substitution on intrinsic electronic conductivity have been revealed by different in/ex-situ characterization techniques and theoretical calculations, where redox processes generated by Mn 3+ /Mn 4+ , enhanced ionic/electron pathway, and the pinning effect caused by injecting inert MgO 6 octahedra into the NASICON framework are key points to high capacity and long-life span.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2024
·
IF 6.1
Yongquan Zhang,Hongchang Gao,Jingshun Wang,Qingguo Chi,Tiandong Zhang,Changhai Zhang,Yu Feng,Yue Zhang,Dianxue Cao,Kai Zhu
All-solid-state lithium metal batteries (ASSLMBs) are considered the most competitive next-generation energy storage batteries due to their high energy density and high safety. Polyethylene oxide (PEO) is an ideal solid-state electrolyte due to its high chain flexibility, high dielectric constant, and strong dissociation ability towards lithium salts. However, the application of PEO is severely hindered by drawbacks such as low ion conductivity at room temperature and low electrochemical window. In this work, we constructed a Li1.25Al0.25Zr1.75(PO4)3 (LAZP)/PEO composite solid-state electrolyte (CSSE) with improved ion conductivity, enlarged electrochemical window, and stable charge–discharge cycle performance. The CSSE leads to an obvious LiF layer and Li2CO3 formation at the interface of lithium metal. Meanwhile, the addition of LAZP reduces the side reaction between PEO and the lithium metal significantly and suppresses the deterioration of ion conductivity. In addition, we modified LiFePO4 (M-LFP), the cathode sheet of the ASSLMBs, by adding an appropriate proportion of multi-walled carbon nanotubes (MWCNTs), PEO and lithium bis(trifluoromethane sulfonimide) (LiTFSI) to improve the ionic and electronic conductivity inside the cathode of the ASSLMBs. The Li/CSSE/M-LFP full cell exhibits a specific discharge capacity of 152 mA h g−1 at 60 °C and 2 C rate and a capacity retention rate of 93.5% after 200 cycles at 1 C. This work demonstrates an effective strategy for increasing the specific capacity, rate ability and long-cycle performance of ASSLMBs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·Vol. 45
·期 8
·11068-11072
·
IF 3.45
Yanqing Lai,Zhen Sun,Liangxing Jiang,Xiaojing Hao,Ming Jia,Li Wang,Fangyang Liu
NASICON-type LiZr 2 (PO 4 ) 3 (LZP) has a high bulk ionic conductivity (∼10 −4 S cm −1 ) and a wide electrochemical stability window between 0 and 5.5 V. However, LZP suffers from a problem in which its desirable rhombohedral phase transforms to the triclinic phase (∼10 −8 S cm −1 ) below 50 °C. In this work, we reported a rhombohedral-structured LiZr 2 (PO 4 ) 3 (α-LZP) at room temperature with a high total Li-ion conductivity (2.8 × 10 −6 S cm −1 ) by a microwave sintering process. Moreover, this approach realized a drastic reduction in the sintering temperature from the typical 1200 °C–900 °C with only a 4 h holding time. Using this approach, we also demonstrated the successful synthesis of Ca-incorporated Li 1.2 Ca 0.1 Zr 1.9 (PO 4 ) 3 (LCZP) with an ionic conductivity of 1.7 × 10 −5 S cm −1 .
研究领域:
材料科学
·
电化学
·
固体离子学
·
储能技术
·
陶瓷工艺
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2022
·
IF 4.177
Xuejia Luo,Mengyao Wang,Yuting Xie,Zhiqiang Wang,Qingshan Xie,Fanghui Lou,Guan Wang,Huming Hao,Liangxuan Yang,Guixin Wang
Severe deformation, thermal runaway, and low ionic migration do harm to the applications of silicon. Herein, a negative thermal expansion material of LiTi2(PO4)3 (LTP) with high ionic conductivity was synthesized and utilized to modify nanoscaled Si, and its effects were investigated. Si modified with 3 wt % LTP (SL3) shows the best performance, and its discharge capacities retain 849.4 and 410.9 mAh/g after 100 cycles at 2 A/g as temperatures are 25 and 60 °C, respectively, about 245.4 and 399.9% higher than those of Si. At 60 °C, the diffusion coefficient of lithium ions in Si is increased by 26 times, while the voltage difference between the main redox peaks, charge transfer resistance, and strain of the SL3 are 0.43 V, 171.4 Ω/cm2, and 211 με, respectively, around 15.7, 94.8, and 45.3 lower than those of the Si. The released heat of SL3 is declined to 175.4 J/g, about 85.9% that of the Si. The improvement mechanism of Si by LTP is discussed. It provides a path for enhancing the performance and safety of materials by decreasing heat and deformation hazards, improving the interface, and intensifying transfer.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Xiaoyi Li,Yongjian Zhou,Jiawen Tang,Siliang Zhao,Jingyong Zhang,Xiao Huang,Bingbing Tian
NASICON-type Li1.3Al0.3Ti1.7(PO4)3 (LATP) has attracted a lot of attention because of its high ionic conductivity and stability to air and moisture. However, the size effect of LATP primary particles on ionic conductivity is ignored. In this study, different sizes of LATP particles are prepared to investigate the morphology, relative density, and ionic conductivity of the LATP solid electrolyte. The influences of particle size and sintering temperature on the microstructure, phase composition, and electrical properties of LATP ceramics were systematically studied. The medium-sized LATP particle (2 μm) presents a great microstructure with a high relative density of over 97%, the highest ionic conductivity of 6.7 × 10–4 S cm–1, and an activation energy of 0.418 eV. The Li–Li symmetric cells and Li–LFP batteries delivering good electrochemical performance were fabricated with highly conductive LATP ceramics. These results make significant strides in elucidating the relationship between the particle sizes of LATP and its electrochemical performance.
研究领域:
材料科学
·
固体离子学
·
储能
·
陶瓷材料
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2015
·
IF 2.999
Jian Liu,Xiulan Duan,Yang Zhang,Ziqing Li,Fapeng Yu,Huaidong Jiang
Rb 2 Ti 1.95 Yb 0.05 (PO 4 ) 3 crystals with langbeinite-type structure were grown by high-temperature solution method. The chemical composition and electronic structure were analyzed using inductive coupled plasma atomic emission spectroscopy (ICP-AES) and X-ray photoelectron spectroscopy (XPS). The deconvolution of Ti 2p 3/2 photoemission line reveals two peaks at 459.3 eV and 458.1 eV, indicating titanium existence in two valence states: Ti 4+ (459.3 eV) and Ti 3+ (458.1 eV). The reduced BE difference ΔBE (O 1s-Ti 2p 3/2 ) shows stronger ionicity of Ti–O bonds in Rb 2 Ti 1.95 Yb 0.05 (PO 4 ) 3 compared with RbTiOPO 4 . Additionally, UV absorption, specific heat, and second harmonic generation (SHG) efficiency were studied. The UV absorption edge of the Rb 2 Ti 1.95 Yb 0.05 (PO 4 ) 3 crystal was observed at 368 nm. The SHG intensity of Rb 2 Ti 1.95 Yb 0.05 (PO 4 ) 3 is 5–6 times greater than that of KDP crystal when the particle size is between 38 and 74 μm.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Erqing Zhao,Yudi Guo,Guangri Xu,Long Yuan,Jingcheng Liu,Xiaobo Li,Li Yang,Jingjing Ma,Yuanchao Li,Shumin Fan
Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 is regarded as one of the most promising solid electrolytes for all solid state lithium ion batteries (ASSLIBS). However, its grain boundary conductivity is still low, which reduces the total conductivity of electrolyte. In this work, in order to further improve the electrical conductivity of Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 , a series of Y doped Li 1.3 Al 0.3-x Y x Ti 1.7 (PO 4 ) 3 (x = 0, 0.025, 0.05, 0.075 and 0.15) solid electrolytes were synthesized using a modified solid state method. Effects of Y doping content on morphology, phase and electrical conductivity of Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 electrolyte materials were systematically investigated. All synthetic electrolyte powders show Nasicon-like structure, well-shaped polyhedral morphology as well as good crystallinity. Y dopant content has a great influence on electrochemical properties of electrolytes. The high total conductivity of 7.8 × 10 −4 S/cm at room temperature and a low activation energy of 0.17 eV is obtained for the electrolyte with the Y doping content of 0.075 due to the increasing of grain boundary conductivity, and its electrical conductivity is about 2 times larger than that of the undoped electrolyte. The excellent electrochemical performance is mainly attributed to high electrolyte density which results from the good sintering property of electrolyte materials as well as the existence of YPO 4 phase at grain boundaries. Additionally, this electrolyte has a negligible electronic conductivity. These results suggest that Y doped Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 can be used as an alternative solid electrolyte for all solid state lithium ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
·
2024
·Vol. 121
·期 17
·e2311075121
·
IF 9.4
Lanfang Que,Fuda Yu,Jihuai Wu,Zhang Lan,Yutong Feng,Ruizheng Zhao,Zhihao Sun,Zhuo Yang,Hao Luo,Dongliang Chao
Voltage oscillation at subzero in sodium-ion batteries (SIBs) has been a common but overlooked scenario, almost yet to be understood. For example, the phenomenon seriously deteriorates the performance of Na3V2(PO4)3 (NVP) cathode in PC (propylene carbonate)/EC (ethylene carbonate)-based electrolyte at −20 °C. Here, the correlation between voltage oscillation, structural evolution, and electrolytes has been revealed based on theoretical calculations, in-/ex-situ techniques, and cross-experiments. It is found that the local phase transition of the Na3V2(PO4)3 (NVP) cathode in PC/EC-based electrolyte at −20 °C should be responsible for the oscillatory phenomenon. Furthermore, the low exchange current density originating from the high desolvation energy barrier in NVP-PC/EC system also aggravates the local phase transformation, resulting in severe voltage oscillation. By introducing the diglyme solvent with lower Na-solvent binding energy, the voltage oscillation of the NVP can be eliminated effectively at subzero. As a result, the high capacity retentions of 98.3% at −20 °C and 75.3% at −40 °C are achieved. The finding provides insight into the abnormal SIBs degradation and brings the voltage oscillation behavior of rechargeable batteries into the limelight.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）