Nano-Micro Letters
·
2020
·Vol. 12
·期 1
·1-15
·
IF 12.264
Zhai Xian-Zhi,Qu Jin,Hao Shu-Meng,Jing Ya-Qiong,Chang Wei,Wang Juan,Li Wei,Abdelkrim Yasmine,Yuan Hongfu,Yu Zhong-Zhen
A layered sodium-ion/crystal water co-intercalated Na 0.55 Mn 2 O 4 ·0.57H 2 O (NMOH) cathode is synthesized successfully with a selectively etching method for zinc-ion batteries.
A displacement/intercalation mechanism is confirmed in the Mn-based cathode for the first time.
The NMOH cathode delivers a competitive reversible capacity of 201.6 mA h g −1 at 500 mA g −1 after 400 cycles.
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
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 38
·2204794
·
IF 19.924
Han Yang,Zheyan Qian,Jiajia Wang,Jianyou Feng,Chengqiang Tang,Liyuan Wang,Yue Guo,Ziwei Liu,Yiqing Yang,Kailin Zhang,Peining Chen,Xuemei Sun,Huisheng Peng
Electrophysiology and neurochemicals such as Ca 2+ , K + , and Na + on the cerebral cortex can synergistically reflect the neurophysiological states. Transparent electrodes have been reported to record electrocorticography (ECoG) and image Ca 2+ on the cerebral cortex surface. However, Ca 2+ imaging is unable to track extracellular changes correlated with neural activities such as anesthesia, and imaging techniques to monitor K + and Na + are yet unavailable. Here, a flexible multifunctional electrode (FME) based on carbon nanotube array is presented to record ECoG and extracellular ions of Ca 2+ , K + , and Na + . The FME exhibits both lower impedance and higher capacitance than that of conventional gold electrodes. It simultaneously shows stable ion-sensing performance and long-term biocompatibility. The FME realizes multi-model recording of ECoG and extracellular ions on the cerebral cortex surface of rats, providing an effective detection method for brain science.
研究领域:
神经科学
·
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2016
·Vol. 32
·期 11
·2761-2768
·
IF 0.844
LI Ting,XIANG Shuang-Fei,DONG Wei-Fu,MA Pi-Ming,SHI Dong-Jian,CHEN Ming-Qing
(3-Acrylamidopropyl)trimethylammonium chloride (ATC), acrylamide and montmorillonite (MMT) without organic modification were synthesized through free radical polymerization to strengthen the mechanical properties of hydrogels. MMT platelets were considered as chemical "plane"
cross-linkers different from "point" cross-linkers because of the cation-exchange reaction between MMT and ATC (cationic monomer) during the synthesis of hydrogels, while a double network was used to improve the mechanical properties of the hydrogels. Investigations of compressive
and tensile properties indicated that compressive modulus and stress, fracture stress, ultimate strain and Young′s modulus were significantly improved in the presence of MMT. The mechanical properties of double-network hydrogels improved with increasing monomer concentration of the first
network. Scanning electron microscopy (SEM) revealed that large quantities of micro-network structures were located in the pores and the formation of embedded micro-network structures led to an increase in the compressive strength and toughness. Moreover, the gels with ATC exhibited good antibacterial
effects against E. coli and S. aureus. These developments provide a new route to prepare hydrogels with high mechanical properties.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
PHARMACOLOGY BIOCHEMISTRY AND BEHAVIOR
·
2025
·
IF 2.5
Yikai Chen,Wen Ye,Wenxin Wang,Nan Miao,Yongqiang Sha,Tao Sun
Major depressive disorder (MDD) is characterized by anhedonia and cognitive deficits. In this study, we investigated the therapeutic effects of nicotinic acid (NA), a nicotinamide adenine dinucleotide + (NAD + ) precursor, in a mouse chronic restraint stress (CRS) model. Behavioral assessments revealed that NA ameliorated depressive-like behaviors, evidenced by restored sucrose preference and reduced immobility in forced swim and tail suspension tests, without affecting motor coordination in the rotarod test. Hippocampal transcriptomic analysis indicated that NA reversed stress-induced gene dysregulation, activated neuroprotective Wnt/β-catenin, cGMP–PKG, and cAMP pathways, and rescued lipid and porphyrin metabolism. In conclusion, NA likely exerts antidepressant effects by remodeling hippocampal gene networks to enhance synaptic plasticity and restore metabolic homeostasis. These findings highlight NA as a promising metabolic antidepressant and support the development of NAD + precursor–based potential therapies for mood disorders.
研究领域:
神经生物学
·
精神病学
·
分子药理学
·
代谢组学
·
转化医学
·
表观遗传学
·
神经内分泌学
✓ 已验证
产品关联
DOI
PubMed
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
Nano Research
·
2020
·Vol. 14
·期 1
·139-147
·
IF 8.183
Pan Jun,Wang Nana,Li Lili,Zhang Feng,Cheng Zhenjie,Li Yanlu,Yang Jian,Qian Yitai
Ti-based anode materials in sodium ion batteries have attracted extensive interests due to its abundant resources, low toxicity, easy synthesis and long cycle life. However, low Coulombic efficiency and limited specific capacity affect their applications. Here, cubic-phase TiP 2 O 7 is examined as anode materials, using in-situ/ex-situ characterization techniques. It is concluded that the redox reactions of Ti 4+ /Ti 3+ and Ti 3+ /Ti 0 consecutively occur during the discharge/charge processes, both of which are highly reversible. These reactions make the specific capacity of TiP 2 O 7 even higher than the case of TiO 2 that only contains a simple anion, O 2− . Interestingly, Ti species participate only one of the redox reactions, due to the remarkable difference in local structures related to the sodiation process. The stable discharge/charge products in TiP 2 O 7 reduce the side reactions and improve the Coulombic efficiency as compared to TiO 2 . These features make it a promising Ti-based anode for sodium ion batteries. Therefore, TiP 2 O 7 @C microflowers exhibit excellent electrochemical performances, ~ 109 mAh·g −1 after 10,000 cycles at 2 A·g −1 , or 95.2 mAh·g −1 at 10 A·g −1 . The results demonstrate new opportunities for advanced Ti-based anodes in sodium ion batteries.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
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
Nature Communications
·
2021
·Vol. 12
·期 1
·1-11
·
IF 14.919
Zuo Wenhua,Liu Xiangsi,Qiu Jimin,Zhang Dexin,Xiao Zhumei,Xie Jisheng,Ren Fucheng,Wang Jinming,Li Yixiao,Ortiz Gregorio F.,Wen Wen,Wu Shunqing,Wang Ming-Sheng,Fu Riqiang,Yang Yong
Layered transition metal oxides are the most important cathode materials for Li/Na/K ion batteries. Suppressing undesirable phase transformations during charge-discharge processes is a critical and fundamental challenge towards the rational design of high-performance layered oxide cathodes. Here we report a shale-like Na x MnO 2 (S-NMO) electrode that is derived from a simple but effective water-mediated strategy. This strategy expands the Na + layer spacings of P2-type Na 0.67 MnO 2 and transforms the particles into accordion-like morphology. Therefore, the S-NMO electrode exhibits improved Na + mobility and near-zero-strain property during charge-discharge processes, which leads to outstanding rate capability (100 mAh g −1 at the operation time of 6 min) and cycling stability (>3000 cycles). In addition, the water-mediated strategy is feasible to other layered sodium oxides and the obtained S-NMO electrode has an excellent tolerance to humidity. This work demonstrates that engineering the spacings of alkali-metal layer is an effective strategy to stabilize the structure of layered transition metal oxides.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Huajun Xu,Jiaxing Fan,Di Pang,Yingying Zheng,Gang Chen,Fei Du,Yury Gogotsi,Yohan Dall'Agnese,Yu Gao
Ferric vanadate (FeVO 4 ) is a desirable anode candidate for lithium-ion battery (LIB) and sodium-ion battery (SIB) because of its high theoretical capacity, low cost and ease of synthesis. However, its practical application is hindered by its volume expansion during the Li + /Na + insertion/extraction and low electronic conductivity. Herein, flexible and free-standing FeVO 4 /Ti 3 C 2 T x (FVO/MX) films have been made via combining FeVO 4 nanorods and Ti 3 C 2 T x MXene sheets via a simple method of vacuum assisted filtration. In the composite films, Ti 3 C 2 T x sheets act as host and FeVO 4 nanorods are uniformly deposited onto the layers. FeVO 4 nanorods are encapsulated by Ti 3 C 2 T x sheets, forming a three-dimensional network sandwich structure. The binder-free FVO/MX films exhibited superior electrochemical performance due to the synergyy between FeVO 4 and Ti 3 C 2 T x . Specifically, when FVO/MX electrode was used in a lithium-ion battery, it delivered reversible capacity of 1179 mAh g −1 and 1125 mAh g −1 after 250 cycles at a current density of 0.1 A g −1 . Besides, the FVO/MX = 2:1 anode delivered a reversible capacity of 428 mAh g −1 at 5 A g −1 and 69.5% capacity was retained after 2500 cycles. Moreover, the Na-ion storage capacity reaches 129 mAh g −1 at a high current density of 5 A g −1 , showing capacity retention of 81.1% after 5000 cycles. The charging and discharging mechanism of the FVO/MX based lithiumion battery was studied by in-situ XRD technique. Owing to high metallic conductivity and 2D morphology of Ti 3 C 2 T x MXene, 3D networks can be constructed by combining other active agents, suggesting that MXene is a promising host material for the next-generation flexible energy storage devices.
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 MATERIALS SCIENCE
·
2022
·Vol. 57
·期 25
·11774-11782
·
IF 4.682
Liu Limin,Liang Dongshi,Zhou Xiaoliang,Liu Yujian,Su Jiawen,Xu Yao,Peng Jinsong
NASICON-type material Na 1+ x Zr 2 Si x P 3− x O 12 (0 ≤ x ≤ 3) is considered to be one of the most promising solid-state electrolytes that can be applied in all-solid-state sodium batteries (SSNBs). However, further increasing the ionic conductivity of Na 1+ x Zr 2 Si x P 3− x O 12 (0 ≤ x ≤ 3) to obtain higher performance electrolyte materials is still a challenge for its practical application. Herein, the Na 3.4 Zr 2 Si 2.4 P 0.6 O 12 (NZSP) powder is prepared by the solution-assisted solid-state reaction (SA-SSR), and solid-state electrolytes with excellent electrochemical properties are obtained by doping with NaF as a sintering aid. With the increase of NaF doping, the crystal structure of NZSP is changed as well as a slight excess of Na + may increase the bottleneck size of the crystal, so that it enhances the migration ability of Na + in the crystal. Also, NaF as a sintering aid lowers the sintering temperature, increases the densities and improves the effective contact between crystals, which reduces the grain boundary impedance of NZSP. However, the excessive NaF dopant leads to the generation of microcracks decreasing the Na + conducting and mechanical properties of solid-state electrolytes. Using this simple and low-cost strategy of NaF doping, NZSP-0.3NaF achieves an excellent conductivity of 4.98 mS cm −1 with unexpectedly low activation energy of 0.227 eV. Therefore, this composition is one of the few electrolytes with high conductivity reported so far and is a competitive option for solid-state sodium batteries.
研究领域:
材料科学
·
电化学
·
固态离子学
·
能源材料
·
无机非金属材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2016
·Vol. 52
·期 2
·869-877
·
IF 2.302
Fan Shaohua,Wang Shikai,Xu Wenbin,Li Meng,Sun Hongtao,Hu Lili
Efficient upconversion (UC) microcrystals are important for the development of novel photonic markers, solid-state lasers, displays, etc. Herein, we report on greatly enhanced UC emission in β-NaYF 4 :20Yb,2Er microcrystals via a simple ion-exchange reaction. The ion exchange accompanying with an ionic redistribution process is demonstrated. By simply controlling the amount of NaF (0–8.0 mmol), reaction temperature (140–220 °C), and duration (0–144 h), enormous enhancement of the UC emission up to ~4200 times is obtained compared with the pre-synthesized β-NaYF 4 :20Yb,2Er microcrystals. The decrease of body defects and change of local structure around lanthanide may account for the UC emission enhancement. This method may apply to other UC materials to increase the UC emission efficiency.
研究领域:
材料科学
·
光子学
·
纳米技术
·
无机化学
·
发光材料
✓ 已验证
DOI
高影响因子
BULLETIN OF MATERIALS SCIENCE
·
2016
·Vol. 39
·期 1
·187-193
·
IF 0.895
CAO RENPING,QIN ZHENGDONG,JIANG SHENHUA,LIANG AIHUI,LUO ZHIYANG,YU XIAOGUANG
A series of CaNb 2 O 6 : x Sm 3+ (0 ≤
x
≤ 10 mol%) and CaNb 2 O 6 : Sm 3+ , Na + /B 3+ phosphors were synthesized by the solid-state reaction method in air. Their crystal structures and luminescence properties were investigated and analysed, respectively. Host CaNb 2 O 6 emitted blue light with excitation 270 nm. CaNb 2 O 6 : x Sm 3+ phosphors showed a systematically varied hue from blue to white by changing Sm 3+ ion concentration from 0 to 10 mol% with excitation of 270 nm and their chromaticity coordinates were the regions from (0.1665, 0.1767) to (0.2484, 0.2260). Luminescence properties of CaNb 2 O 6 : Sm 3+ phosphor were tuned and improved significantly by codoping B 3+ or Na + ions. Energy transfer between Nb \(_{\mathbf {2}}\textit {O}_{\mathbf {6}}^{\boldsymbol {2-}}\) group and Sm 3+ ion was observed and analysed via luminescence properties. The luminous mechanism was explained by energy level scheme and energy transfer process in CaNb 2 O 6 : Sm 3+ phosphor. The strong excitation band peaking at ∼ 407 nm indicated that the CaNb 2 O 6 : Sm 3+ , Na + /B 3+ phosphor has a potential application in white light-emitting diodes based on near-UV LED chip.
研究领域:
材料科学
·
无机化学
·
发光材料
·
固体物理
·
光电子学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）