Inorganic Chemistry Frontiers
·
2020
·Vol. 7
·期 5
·1182-1189
·
IF 5.958
Xianglong Huang,Jianhua Deng,Yuruo Qi,Dingyu Liu,Yuanke Wu,Wei Gao,Wei Zhong,Fang Zhang,Shujuan Bao,Maowen Xu
A rechargeable K–Se battery is emerging as an energy storage system because of its much higher specific capacity than that of the traditional alkali metal-ion batteries, but is facing some critical issues and challenges. Exploiting stable and efficient Se-based cathode materials is one of the key points for addressing the intrinsic drawbacks of this new system. Herein, we developed an effective electrode (nitrogen-doped porous carbon sponge) to serve as an advanced electrode for K–Se batteries. The novel electrode presents good multifunctional characteristics, such as efficient confinement of selenium, valid accommodation of volumetric change, stable conductive framework and promotion of fast electron/ion transportation. Accordingly, desirable electrochemical performances are achieved when the as-obtained Se/carbon composite is used as the cathode of K–Se batteries. This work, via smart and efficient electrode design, unfolds a new idea to accelerate the development of advanced K–Se batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2015
·
IF 2.679
Hui-Hui Zhang,Na Kong,Jie Wang,Zhi-Hong Liu
Two pure microporous copper borates (NaCuB 7 O 12 · H 2 O and KCuB 7 O 12 · H 2 O) have been synthesised and characterized by XRD, FT-IR, TG techniques and chemical analysis. The molar enthalpies of solution of NaCuB 7 O 12 · H 2 O (s) and KCuB 7 O 12 · H 2 O (s) in 1 mol · dm −3 HCl (aq) were determined to be – (24.12 ± 0.12) kJ · mol −1 and – (35.07 ± 0.08) kJ · mol −1 , respectively. The molar enthalpies of solution of 0.72 mg of NaCl (s) and 0.91 mg of KCl in the mixture solvent of 2.00 cm 3 of 1 mol · dm −3 HCl (aq) which contains 5.3 mg of H 3 BO 3 were measured, respectively. The molar enthalpies of solution of 2.09 mg of CuCl 2 · 2H 2 O (s) in the mixture solvent of 2.00 cm 3 of 1 mol · dm −3 HCl (aq) which contains 5.3 mg of H 3 BO 3 and 0.72 mg of NaCl/0.91 mg of KCl were also measured, respectively. With the incorporation of the previously determined enthalpy of solution of H 3 BO 3 (s) in 1 mol · dm −3 HCl (aq), together with the standard molar enthalpies of formation for CuCl 2 · 2H 2 O (s), NaCl (s)/KCl (s), H 3 BO 3 (s), HCl (aq) and H 2 O (l), the standard molar enthalpies of formation of – (5373.3 ± 5.6) kJ · mol −1 for NaCuB 7 O 12 · H 2 O (s) and – (5375.0 ± 5.6) kJ · mol −1 for KCuB 7 O 12 · H 2 O (s) at T = 298.15 K were obtained on the basis of the appropriate thermochemical cycles. It is obvious that KCuB 7 O 12 · H 2 O (s) is more thermal stable than that of NaCuB 7 O 12 · H 2 O (s).
研究领域:
化学热力学
·
材料科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2020
·
IF 5.162
Xiaoxiao Sun,Chuqiao Pan,Zhuoyang Ying,Dongyan Yu,Xitai Duan,Fangfang Huang,Junhong Ling,Xiao-kun Ouyang
We aimed to develop a stable nanosystem with k -carrageenan (Kc), an anionic polysaccharide , combined with tween 80 to stabilize zein nanoparticles. The experimental results showed that the particle size, zeta-potential, and stability of the system depend on the Kc amount when the zein amount was unchanged. We found that the nanosystem with 5.0 and 10.0 mg Kc had a smaller particle size (250.1 ± 0.9 and 287.6 ± 1.4 nm, respectively), low polydispersity index (PDI, ≤ 0.20), and high stability when the external conditions changed. No obvious flocculation or deposition was observed at pH of 3–9, salt ion concentrations of 0–500 mmol/L, temperature of 30 °C and 50 °C–90 °C, and storage at 4 °C for 30 days. When the Kc-ZNP system was loaded with curcumin (Cur), there was a good encapsulation effect (5.0 mg Kc with 1.00 mg Cur (EE (%) = 34.69% ± 2.02%, size = 380.23 ± 5.80 nm, PDI = 0.252 ± 0.018) and 10.0 mg Kc with 2.00 mg Cur (EE (%) = 20.13% ± 1.05%, size = 431.27 ± 0.78 nm, PDI = 0.269 ± 0.020), ensuring that the particle size was not too large. Therefore, Kc–ZNPs could be a potential delivery system for fat-soluble drugs.
研究领域:
食品科学
·
药物递送系统
·
生物材料
✓ 已验证
DOI
高影响因子
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
·
2022
·Vol. 119
·期 23
·e2122252119
·
IF 12.779
Xianlu Lu,Xinfeng Zhang,Yapeng Zheng,Dongdong Zhang,Lan Jiang,Fengmei Gao,Qiao Liu,Dingfa Fu,Jie Teng,Weiyou Yang
Currently, a big problem for exploring K-ion half/full batteries is how to bring them with both high specific capacity and long cycling stability simultaneously, in terms of their intrinsically sluggish kinetics of K+ with larger radius than that of Li+, which often causes huge volume change over the electrochemical reaction. Herein, we report the exploration of high-performance K-ion half/full batteries with superb rate capability and cycle stability based on B-doped porous carbons with increased active sites and improved conductivity. The as-assembled K-ion half cell exhibits an excellent rate capability of 428 mA h g−1 at 100 mA g−1 and a high reversible specific capacity of 330 mA h g−1 with 120% specific capacity retention after 2,000 cycles at 2,000 mA g−1, which is state of the art among those based on carbon materials. Moreover, the as-constructed full cell delivers 98% specific capacity retention over 750 cycles at 500 mA g−1, which is superior to most of the analogs based on carbon materials that have been reported thus far, underscoring their potential applications in advanced energy storage.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
PubMed
高影响因子
Nature Communications
·
2021
·Vol. 12
·期 1
·1-9
·
IF 14.919
Gao Xiaoyi,Cheng Zhenxiang,Chen Zibin,Liu Yao,Meng Xiangyu,Zhang Xu,Wang Jianli,Guo Qinghu,Li Bei,Sun Huajun,Gu Qinfen,Hao Hua,Shen Qiang,Wu Jinsong,Liao Xiaozhou,Ringer Simon P.,Liu Hanxing,Zhang Lianmeng,Chen Wen,Li Fei,Zhang Shujun
(K,Na)NbO 3 based ceramics are considered to be one of the most promising lead-free ferroelectrics replacing Pb(Zr,Ti)O 3 . Despite extensive studies over the last two decades, the mechanism for the enhanced piezoelectricity in multi-elements doped (K,Na)NbO 3 ceramics has not been fully understood. Here, we combine temperature-dependent synchrotron x-ray diffraction and property measurements, atomic-scale scanning transmission electron microscopy, and first-principle and phase-field calculations to establish the dopant–structure–property relationship for multi-elements doped (K,Na)NbO 3 ceramics. Our results indicate that the dopants induced tetragonal phase and the accompanying high-density nanoscale heterostructures with low-angle polar vectors are responsible for the high dielectric and piezoelectric properties. This work explains the mechanism of the high piezoelectricity recently achieved in (K,Na)NbO 3 ceramics and provides guidance for the design of high-performance ferroelectric ceramics, which is expected to benefit numerous functional materials.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
PubMed
高影响因子
Nano Research
·
2021
·Vol. 14
·期 12
·4502-4511
·
IF 8.897
Li Deping,Sun Qing,Zhang Yamin,Dai Xinyue,Ji Fengjun,Li Kaikai,Yuan Qunhui,Liu Xingjun,Ci Lijie
Carbon-based material has been regarded as one of the most promising electrode materials for potassium-ion batteries (PIBs). However, the battery performance based on reported porous carbon electrodes is still unsatisfactory, while the in-depth K-ion storage mechanism remains relatively ambiguous. Herein, we propose a facile “in situ self-template bubbling ” method for synthesizing interlayer-tuned hierarchically porous carbon with different metallic ions, which delivers superior K-ion storage performance, especially the high reversible capacity (360.6 mAh·g −1 @0.05 A·g −1 ), excellent rate capability (158.6 mAh·g −1 @10.0 A·g −1 ) and ultralong high-rate cycling stability (82.8% capacity retention after 2,000 cycles at 5.0 A·g −1 ). Theoretical simulation reveals the correlations between interlayer distance and K-ion diffusion kinetics. Experimentally, deliberately designed consecutive cyclic voltammetry (CV) measurements, ex situ Raman tests, galvanostatic intermittent titration technique (GITT) method decipher the origin of the excellent rate performance by disentangling the synergistic effect of interlayer and pore-structure engineering. Considering the facile preparation strategy, superior electrochemical performance and insightful mechanism investigations, this work may deepen the fundamental understandings of carbon-based PIBs and related energy storage devices like sodium-ion batteries, aluminum-ion batteries, electrochemical capacitors, and dual-ion batteries.
研究领域:
材料科学
·
能源存储
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2014
·
IF 2.083
Mengmeng Liang,Yonghong Hu,Xiang Liu,Jun Guan,Wenge Yang,Yan Liu
The solubilities of maleic anhydride in methanol + (acetone, ethyl acetate) mixed solvents were measured within the temperature range of 278.15–323.15 K at atmospheric pressure by the gravimetric method. The solubility of maleic anhydride in those mixed solvents increased with increasing temperature, but the rate of solubility is different. In addition, the solubility of maleic anhydride also increased with the increasing mass fraction of methanol. The experimental data were well-correlated with the modified Apelblat equation, the λh equation and the van't Hoff equation. Moreover, the calculated solubilities shown good agreement with the experimental results. It was found that the modified Apelblat equation could obtain the better correlation results than the other two models. The thermodynamic properties of the solution process, including the enthalpy, and entropy were calculated by the van't Hoff analysis and they were positive. What's more, the experimental data and model parameters would be useful for optimizing the process of purification of maleic anhydride in industry.
研究领域:
化学工程
·
热力学
·
物理化学
·
分离过程
·
工艺优化
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2019
·Vol. 7
·期 2
·394-401
·
IF 5.934
Yushan Luo,Mengli Tao,Jianhua Deng,Renming Zhan,Bingshu Guo,Qianru Ma,Muhammad Kashif Aslam,Yuruo Qi,Maowen Xu
K-ion batteries (KIBs) are considered as one of the most promising devices for large-scale energy storage because of the comparable output voltage with lithium-ion batteries and the abundant reserves of potassium. FeS2 is regarded as a kind of very important anode material for KIBs due to its low cost and high capacity. However, the poor electronic conductivity and huge volume expansion of FeS2 during the discharge/charge process strongly inhibit the K-storage performance. To solve these problems, herein, unique core–shell FeS2@C nanocubes with nanoparticles in the interior and carbon shells in the exterior are designed. The inside FeS2 nanoparticles are beneficial for K+ diffusion and the penetration of the electrolyte, while the outside carbon shells can enhance the electronic conductivity and suppress the volume expansion. The unique core–shell structure displays outstanding K-storage performance with impressive specific capacity, excellent cycling stability, and superior rate capability with 73% capacity retention at 2 A g−1. This work not only provides solutions to obtain a superior anode material for KIBs but also offers insights into designing a hierarchical structure for energy storage systems.
研究领域:
材料科学
·
能源化学
·
纳米技术
·
电化学储能
✓ 已验证
DOI
高影响因子
Materials Chemistry Frontiers
·
2021
·Vol. 5
·期 6
·2715-2723
·
IF 6.482
Xiaojing Feng,Zhongnan Guo,Xiaoxiao Yan,Jun Deng,Dan Wu,Zijing Zhang,Fan Sun,Wenxia Yuan
Metal phosphorus trichalcogenides (MPX3) are of great interest since these layered materials exhibit wide applications in optical, electrical and magnetic fields. An effective chemical intercalation route for MPX3 which could regulate their physical properties, however, is still lacking. In this work, we show that the liquid ammonia method is an efficient route to co-intercalate alkali metals and NH3 molecules into the gaps in FePS3. After intercalation, the interlayer distance is significantly enlarged by ∼3 Å while the monoclinic lattice (C2/m space group) is still maintained. The structure refinement and EDS measurement suggest that intercalation does not induce any Fe vacancy, thus leading to electron transfer from the alkali metal to [FePS3] layers. Interestingly, magnetic susceptibility shows that the intrinsic anti-ferromagnetic transition in the FePS3 matrix is completely suppressed by this intercalation, whereas a spin-glass state is observed in A(NH3)xFePS3 (A = Li, K) in the lower temperature range (<50 K). The intercalation described in this work is reversible: the alkali metal can be easily de-intercalated using a two-step route and the anti-ferromagnetism reappears accordingly. Meanwhile, the liquid ammonia method is also shown to be efficient at intercalating other MPS3 materials (M = Mn, Co, Ni). Our work not only enriches the intercalation chemistry in the MPX3 system but also provides an excellent route to regulate the magnetic properties of these layered materials.
研究领域:
材料科学
·
无机化学
·
凝聚态物理
·
纳米技术
·
功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 108
·期 4
·e20316
·
IF 3.5
Diming Xu,Haowei Zhang,Lixia Pang,Fayaz Hussain,Tao Zhou,Shi-Kuan Sun,Zhijiao Chen,Di Zhou
Microwave dielectric ceramics have drawn intensive interests in recent years due to the advanced development in communication area. High-permittivity dielectric ceramics have thus become the highlight owing to dielectric ceramics with high permittivity could meet the demand of electronic components in both stabilization and miniaturization features. Bi 2 (Li 0.5 Ta 1.5 )O 7 shows its great potential among various high-permittivity dielectric ceramics with a suitable permittivity and a considerable quality factor. Based on previous studies, a series of rational optimizations were conducted on Bi 2 (Li 0.5 Ta 1.5 )O 7 to manipulate the temperature coefficient of resonant frequency (TCF) and the sintering temperature for potential Low Temperature Co-fired Ceramic (LTCC) applications. Two distinguished ceramics were obtained, Bi 2 (Li 0.5 Ta 1.5 )O 7 –0.03Bi 2 O 3 (sintering temperature of 850°C, ε r ∼ 64.1, Qf ∼ 8510 GHz, TCF—25.3 ppm/°C) and Bi 2 [(Li 0.5 Ta 1.5 ) 0.975 Ti 0.05 ]O 7 –0.015Bi 2 O 3 (sintering temperature of 980°C, ε r ∼ 66.2, Qf ∼ 10 950 GHz, TCF—8.5 ppm/°C). Dielectric resonator antenna (DRA) simulation was subsequently conducted and proved the ceramics holding excellent potential for microwave applications.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2019
·
IF 2.298
Yong-Sheng Xu,Xin Liu,Kang-Kang Pei,Rui-Xiong Zhao,Guo-Liang Zhang,Qing Xia,Feng-Bao Zhang
The solubilities of naphthalene in decalin, octane, dodecane, dichloromethane, trichloromethane, carbon tetrachloride, 1,2-dichloroethane, o-dichlorobenzene, 1-octanol, 2-octanone, 4-methyl-2-pentanone, and benzene were measured by a dynamic method over the temperature range of 279 to 330 K at atmospheric pressure. By comparison, the experimental results indicated that the molality solubility in dichloromethane reached maximum at certain temperature. Then, the Apelblat equation, the λh equation, the Wilson equation, and the nonrandom two liquid (NRTL) equation were used to correlate the experimental data. The NRTL equation was regarded as the effective model for all the solvents. Finally, the mixing properties were also calculated based on the NRTL equation. All these data were particularly instructive for the process of recycling naphthalene.
研究领域:
物理化学
·
化工过程
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 32
·21085-21094
·
IF 10.7
Yafei Liu,Hao Sun,Ruifeng Wu,Aimin Chang,Bo Zhang
High ceiling temperature and the corresponding thermal stability are crucial to thermo-sensitive materials under extreme conditions. However, these features are often difficult to achieve simultaneously in conventional thermo-sensitive ceramics, thus becoming a key bottleneck restricting the development of thermo-sensitive ceramics in next-generation advanced high-temperature sensors. Here, for the first time, a (Ho0.2Er0.2Tm0.2Yb0.2Lu0.2)3NbO7 high-entropy ceramic is reported which possesses exceptional thermosensitive capability and high thermal stability. With the structure construction involving constraining a NbO6 octahedron by tailoring the lattice distortion and solving the stability degeneration caused by the tilt of the NbO6 octahedron and dipolar interactions of the off-centered Nb cations, the materials with highly dense lattice distortion dominated by symmetric tensile–compressive strains exhibit thermo-sensitive characteristics from 623 K to 1873 K. More importantly, the materials demonstrate exceptional thermal stability, with an aging coefficient of less than 1% after aging at 1873 K for 400 h. They also show an ultrahigh measurement accuracy (R2 as high as 999.92‰ and RSS as low as 0.071) maintaining excellent sensitivity at temperatures up to 1873 K. This work provides an effective way to design high-temperature thermosensitive ceramics with high ceiling temperature and high thermal stability to meet the demanding requirements of advanced high-temperature measurement applications.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）