NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 5
·3350-3355
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IF 3.201
Ailijiang Abudurusuli,Kui Wu,Shilie Pan
Four new quaternary chalcogenides A2Ba7Sn4Q16 (A = Li, Na; Q = S, Se) were successfully synthesized in vacuum-sealed silica tubes for the first time. All of them crystallize in the noncentrosymmetric (NCS) cubic I3d space group with the cell parameters ranging from 14.807 to 15.4163 Å and Z = 4, respectively. Interestingly, their isostructures are different from the structural transformations (from tetragonal to trigonal) appearing in previously reported Na2BaSnQ4 compounds. As observed in their structures, (Na/Ba)Q4 and SnQ4 units alternately connect with each other by sharing corners to build a three-dimensional (3D) framework structure with charge-balanced Ba cations located within tunnels, which is different from the observation that the Na atoms located inside the tunnels formed by the interconnection of the BaS8 and SnS4 units in Na2BaSnS4. Optical properties (diffuse-reflection, IR, and Raman spectra) were also systematically studied and the results indicate that their optical bandgaps are in the range from 1.75 to 2.5 eV. Moreover, the second harmonic generation (SHG) responses of the title compounds were also measured to be about 0.1–0.5 times higher than that of benchmark AgGaS2 under 2.09 μm radiation.
研究领域:
材料科学
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无机化学
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非线性光学
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晶体学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2017
·
IF 2.986
Na Liu,Zhangxing He,Xubo Zhang,Yingqiao Jiang,Yuehua Li,Jing Zhu,Wei Meng,Lei Dai,Ling Wang
In this paper, Li 1−x Na x Ti 2 (PO 4 ) 3 @carbon (x=0.01, 0.03, and 0.05) composites as anode for aqueous lithium ion batteries were synthesized by in situ coating approach. The doping of Na on Li sites did not break the lattice structure of LiTi 2 (PO 4 ) 3 , while the lattice volume was increased by doping of Na. Among Na-doped LiTi 2 (PO 4 ) 3 @carbon composites, Li 0.97 Na 0.03 Ti 2 (PO 4 ) 3 @carbon (LC-Na-3) demonstrated the best electrochemical properties . Compared with the pristine LiTi 2 (PO 4 ) 3 @carbon (LC) composite, LC-Na-3 composite exhibited better rate and cycling performance. LC-Na-3 composite delivered the discharge capacity of 98.5 mAh g −1 at 0.2 C and 45.0 mAh g −1 at 15 C, 10.9 mAh g −1 and 32.1 mAh g −1 larger than that of LC composite, respectively. Moreover, the discharge capacity retention for LC-Na-3 composite achieved 90.4%, 6.9% higher than that for LC composite at the rate of 2 C after 300 cycles. The improved electrochemical properties of Na-doped LiTi 2 (PO 4 ) 3 @carbon composite was ascribed to the decrease of charge transfer resistance and the acceleration of diffusion of lithium ions , resulting from the widening of diffusion channel for lithium ions, which was verified by XRD measurements.
研究领域:
材料科学
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电化学
·
能源存储
·
无机化学
·
纳米材料
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电池技术
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Xiaoke Wang,Titi Li,Xixi Zhang,Yaxin Wang,Hongfei Li,Hai-Feng Li,Gang Zhao,Cuiping Han
Magnesium ion batteries (MIBs) are a potential field for the energy storage of the future but are restricted by insufficient rate capability and rapid capacity degradation. Magnesium-sodium hybrid ion batteries (MSHBs) are an effective way to address these problems. Here, we report a new type of MSHBs that use layered sodium vanadate ((Na, Mn)V 8 O 20 ·5H 2 O, Mn-NVO) cathodes coupled with an organic 3,4,9,10-perylenetetracarboxylic diimide (PTCDI) anode in Mg 2+ /Na + hybrid electrolytes. During electrochemical cycling, Mg 2+ and Na + co-participate in the cathode reactions, and the introduction of Na + promotes the structural stability of the Mn-NVO cathode, as cleared by several ex-situ characterizations. Consequently, the Mn-NVO cathode presents great specific capacity (249.9 mA h g −1 at 300 mA g −1 ) and cycling (1500 cycles at 1500 mA g −1 ) in the Mg 2+ /Na + hybrid electrolytes. Besides, full battery displays long lifespan with 10,000 cycles at 1000 mA g −1 . The rate performance and cycling stability of MSHBs have been improved by an economical and scalable method, and the mechanism for these improvements is discussed.
✓ 已验证
DOI
高影响因子
CARBON
·
2020
·
IF 8.821
Shuyue Yao,Yujie Ma,Tianhao Xu,Zhongyue Wang,Peng Lv,Jiajin Zheng,Chen Ma,Kehan Yu,Wei Wei,Kostya (Ken) Ostrikov
Carbon coatings hold great promise for next-generation non-conductive energy storage nanomaterials . However, simplicity, stable, uniformity and high-performance remain unresolved issues. Here, unique synergy of the fluidized bed reactor with plasmas enables highly-effective, single-step fluidized-bed plasma-enhanced chemical vapor deposition (FB-PECVD) of uniform, low-temperature carbon coatings on TiO 2 nano-powder (TiO 2 @C). Plasma-specific effects induce the formation of new phases that are beneficial for energy storage. The 6 nm carbon layer is grown within only 10 min, while the TiO 2 maintains its anatase phase. The unique plasma conditions make it possible to form Ti–C bonds at the Ti/C interface at much lower temperatures than achievable otherwise. The electronic transport at the interface and structural stability are thus greatly improved. Consequently, TiO 2 @C shows excellent electrochemical performances as a negative electrode of sodium ion battery , such as specific discharge capacity of 290.2 mA h g −1 at 50 mA g −1 and very stable long-term cyclability (101.2% capacity retention over 300 cycles at 4000 mA g −1 ). Our results show that FB-PECVD is not only a versatile method for bond-reinforced interface nanoparticle coating with carbon, but also provide a new strategy for designing hybrid-phase electrochemically active nanocomposite materials.
研究领域:
材料科学
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纳米科技
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电化学
·
能源存储
·
无机非金属材料
·
表面工程
·
功能材料
✓ 已验证
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 60
·37700-37707
·
IF 3.361
Chao Li,Binhui Luo,Youman Zhao,Yongsheng Chen,Hua Yang,Jingang Song,Lili Zhao,Xiaobo Fu
The stable storage of sodium ions always presents some difficulties for sodium-based dual-ion batteries (S-DIBs), such as the irreversibility of guest-storage and kinetic hindrance in the anode. Based on the low strain volume and stable phase structure, herein, lithium titanate (LTO, Li4Ti5O12) was developed to store sodium ions between the working potential (∼0.8 V), which expands the lower plateau over than that of lithium ion storage (∼1.55 V) to obtain a high energy density of full batteries. The spinel lithium titanate shows negligible volume change and extremely stable structure under Na+-storage, which completely overcomes the shortage problems of the Na+-host. Additionally, by the detection of the transfer state of anions and cations in dual-ion batteries, the diffusion coefficient of the sodium ion in the LTO electrode is higher than that of the cathode, which shows that the transport process of sodium ions can meet the kinetic demands of full batteries. Such S-DIBs exhibit a large working voltage of 2.0–4.6 V and stable electrochemical performance over 1280 cycles, which is superior to conventional sodium-based systems, and further exhibit many advantages such as high energy density, environmental friendliness, and low cost.
研究领域:
电化学
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储能
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材料科学
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电池技术
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2017
·
IF 2.354
Xujiao Yang,Kaiying Wang,Xianli Wang,Guangli Chang,Siao Sun
NASICON-type NaTi 2 (PO 4 ) 3 material has been extensively studied as a promising anode for sodium-ion batteries due to the open 3D framework with the large interstitial spaces, high theoretical capacity and small volume change during cycling process. However, the practical application of NaTi 2 (PO 4 ) 3 is hampered because of its low electronic conductivity . Herein, a simple approach along with post-annealing has been designed and adopted to prepare the carbon-coated NaTi 2 (PO 4 ) 3 (NaTi 2 (PO 4 ) 3 @C) composite. The as-prepared anode material is characterized by XRD , SEM, TEM and Raman spectrum . The electrochemical measurements reveal that NaTi 2 (PO 4 ) 3 @C has excellent Na-storage performances including high reversible capacity (112.6 mAh g − 1 at 0.2 C) and good rate capability (87.1 mAh g − 1 at 5 C). The superior electrochemical performance can be resulted from the synergistic effects of the nanosized NaTi 2 (PO 4 ) 3 particles and conductive carbon layer .
研究领域:
材料科学
·
电化学
·
储能
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2018
·
IF 4.484
Raheel Ahmed Janjua,Chan Gao,Rucheng Dai,Zhilei Sui,Muhammad Aqeel Ahmad Raja,Zhongping Wang,Xianxu Zhen,Zengming Zhang
Ultrasmall pure hexagonal phase NaYF4:Yb,Er is successfully prepared via the solvothermal method. The upconversion (UC) luminescence of hexagonal phase NaYF4:Yb,Er nanocrystals is ten times stronger than that of cubic phase nanocrystals with the same size of 6 nm. XRD results reveal that heating above 673 K leads to conversion of the hexagonal phase to the high-temperature cubic phase, whereas the cubic nanocrystals undergo phase transformation from normal cubic at room temperature to hexagonal at 673 K and further to high-temperature cubic above 773 K. The hexagonal nanocrystals exhibit emission enhancement after heat treatment up to 573 K. Further heating above 773 K induces a decreasing trend in emission due to the phase transition to the high-temperature cubic phase. The cubic phase exhibits decreasing luminescence with temperature due to strong cross relaxation and then increasing luminescence above the temperature of 673 K due to the hexagonal phase transformation. The luminescent properties of both the normal cubic phase and high-temperature cubic phase indicate that different crystal fields exist in these two phases due to the rearrangement of ligands around Er3+ at high temperature.
研究领域:
材料科学
·
纳米技术
·
发光材料
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无机化学
·
光学材料
✓ 已验证
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2023
·
IF 3.8
Jie Zheng,Yu Tang,Yujie Xiang,Yonggui Tao,Kaiyuan Shen,Lanxian Shen,Wen Ge,Peizhi Yang,Shukang Deng
β-Zn4Sb3 is a promising thermoelectric (TE) material, as it contains low-cost and environment-friendly elements. However, its application has long been limited due to the lower figure of merit (ZT), poor mechanical properties, and inferior thermodynamic stability. In this research, we successfully synthesized Na/Ga codoped β-Zn4Sb3 with high thermoelectric performance and stability. The power factor (PF) value of the Ga-doped sample is significantly improved by optimizing carrier concentration, the maximum value of 2.28 × 10–3 W m–1 K–2 is obtained at 690 K, and the maximum ZT reaches 1.73 at 690 K for the Zn4.1Sb3(NaCl)7Ga0.12 sample. Moreover, the TG-DSC and oxidation resistance tests show that Na and Ga codoped β-Zn4Sb3 possess good stability. This work provides an attractive method for improving the thermoelectric properties and stability of β-Zn4Sb3 through diatomic doping.
研究领域:
材料科学
·
热电学
·
固态化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Jin Chen,Chun-Li Hu,Yi-Lin Li,Qian-Qian Chen,Bing-Xuan Li,Jiang-Gao Mao
Herein, we reported two alkali metal molybdenum(VI) iodates, namely, NaMoO 3 (IO 3 ) and γ-KMoO 3 (IO 3 ) with 1D and 3D [MoO 3 (IO 3 )] − anionic architectures, respectively. The novel 1D chain in NaMoO 3 (IO 3 ) and the 3D network in γ-KMoO 3 (IO 3 ) are constructed by the 0D Λ-shaped cis -[MoO 4 (IO 3 ) 2 ] 4− building units interconnected by bridging IO 3 − anions as well as the corner-sharing of oxo anions. Importantly, the polar γ-KMoO 3 (IO 3 ) exhibits a very large second-harmonic generation (SHG) effect of 12 × KH 2 PO 4 (KDP) under 1064 nm laser radiation, a high laser-Induced damage threshold value (52 × AgGaS 2 ), and a moderate birefringence of 0.087@1064 nm, whereas the centrosymmetric NaMoO 3 (IO 3 ) has a large birefringence of 0.208@1064 nm. This study further proves the useful route of exploring promising optical materials via assembling the 0D basic building units into higher dimensional anionic architectures.
研究领域:
无机化学
·
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Yanhua Zhang,Jing Liu,Yumei Xiao,Ziyi Guo,Liuli Zou,Tao Li,Xing Xiang,Jiadong Deng
P2-Na 0.67 Ni 0.33 Mn 0.67 O 2 is considered a promising cathode material for sodium-ion batteries. However, its practical application is still hindered by sluggish Na + diffusion kinetics and structural degradation caused by repeated Na + intercalation/deintercalation during cycling. Herein, by transforming the precursor structure from olive-like hierarchical structure to the peanut-like hierarchical structure, and finally to a microsphere-like hierarchical structure, a P2-Na 0.67 Ni 0.33 Mn 0.67 O 2 cathode material with a hollow hierarchical microsphere structure was obtained. This unique structure shortens Na + diffusion pathways, facilitates electrolyte infiltration, and effectively buffers volume variation during cycling. ICP-MS results indicate that the optimized sample has a relatively higher Na content, which may contribute to a higher charge capacity. SEM and XRD analyses after cycling reveal that the hollow hierarchical microsphere cathode suppresses particle fragmentation and structural degradation, while ex-situ XRD confirms its improved structural reversibility during charge/discharge. Intermittent current titration and multi-sweep cyclic voltammetry further demonstrate higher Na + diffusion coefficients. As a result, the optimized cathode delivers 79.3 mA h g −1 at 10C, corresponding to 76% of the capacity at 0.1C, and 75% higher than that of the olive-like cathode. It also achieves stable cycling for 2000 cycles at 5C, with capacity retentions of 87.51%, 76.83%, and 63.67% after 500, 1000, and 2000 cycles.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Zijian Zhao,Huan Guo,Xiaocan Xie,Yuanyuan Jia,Ke Yang,Xiaoyu Zhao,Yanfei Wang
The role of Na-content on the structural stability and electrochemical performance of P2/O3-type cathode was established. • The structural stability of P2/O3-type Na x Ni 0.23 Mn 0.57 Fe 0.1 Cu 0.1 O 2 cathode is improved by Cu/Fe co-doping. • High Na-content improves the Na⁺ diffusion coefficient as well as rate performance of Na x Ni 0.23 Mn 0.57 Fe 0.1 Cu 0.1 O 2 cathode. P2/O3 biphasic layered oxide cathodes combine the structural stability and fast Na + transport of the P2 phase with the high Na + storage capacity, high operating voltage of the O3 phase. In order to deeply investigate the effect of P2/O3 biphasic composition on the electrochemical performance, Na x Ni 0.23 Mn 0.57 Cu 0.1 Fe 0.1 O 2 samples (NMCF- x ) with the tunable P2/O3 biphasic composition were prepared. The X-ray diffraction results show that the relative ratio of O3 phase increases from 48.53% to 84.46% with increasing Na content from x = 0.70 to x = 0.85. The O3 phase-rich NMCF-0.85 cathode exhibits high rate performance (130.1 and 94.6 mAh g –1 at 0.2C and 5C, respectively) and high capacity retention (69.8% after 500 cycles at 5C). The galvanostatic intermittent titration analysis confirms that the Na + diffusion coefficient reaches as high as 6.99 × 10 –11 cm 2 s –1 . These excellent performances are ascribed to the fact that Cu/Fe co-doping and high Na content suppress the unfavorable P2-O2 phase transition and Na + /vacancy ordering in the NMCF-0.85 when charged to high potential. Thus, this finding can provide profound implications for developing stable layered oxide cathode materials with adjustable P2/O3 biphase for high-energy Na + storage. Cu/Fe co-doping P2/O3 hybrid layered oxide cathodes for SIBs have been prepared through adjusting Na-content, revealing the influence of P2/O3 composition to cycling performance. Download: Download high-res image (248KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2026
·
IF 18.1
Lu Chengxing,Li Boyu,Li Qun,Liu Shuaishuai,Cheng Jinnuo,Yan Jiahao,Wang Zemin,Liu Tong,Wang Jinkai,Zhao Qing
Sluggish kinetics and shuttle effects hinder high-energy rechargeable sodium-chalcogen batteries, requiring nanostructured positive electrodes with excess conductive additives. Here, we show that an acidic binder-induced corrosion strategy enables activity in bulk S/Se/Te positive electrodes. Carboxylic acid-rich binders create an acidic microenvironment (pH≈3) during processing, triggering spontaneous formation of copper chalcogenide interlayers on Cu current collectors. These interlayers reconstruct into active Cu 2 X (X = S/Se/Te) catalysts during cycling. Using Na-Se batteries, experimental and DFT analyses confirm Cu 2 Se reduces the liquid-solid conversion barrier by ~24.1% and accelerates polyselenides conversion. Polar groups in the binders enhance chemisorption, reducing the shuttling effect. Consequently, bulk Se with alginic acid binder achieves 96% theoretical utilization at 0.1 A g ‒1 , rate capability of 508 mAh g ‒1 at 20 A g ‒1 , stable cyclability at 5 A g ‒1 over 16,000 cycles, and low-temperature operation at 0.1 A g ‒1 (94% capacity retention at −20 °C). The strategy of transforming binders into active interface modulators provides a generalizable approach for other chalcogens, enabling practical and host-free rechargeable metal batteries with chalcogen positive electrodes.
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）