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
·
电化学
·
能源存储
·
无机化学
·
纳米材料
·
电池技术
✓ 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
·
纳米科技
·
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
·
储能
·
材料科学
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2015
·
IF 2.037
Haijun Han,Lijiang Guo,Dongdong Li,Ouyang Dong,Yan Yao,Ning Zhang,Dewen Zeng
In this work, the water activities of the NaCl–CaCl2–H2O and KCl–CaCl2–H2O ternary systems and of their sub-binary systems NaCl–H2O and KCl–H2O were measured using an isopiestic method at 323.15 K. The isopiestic composition line for the NaCl–CaCl2–H2O system was found to obey the Zdanovskii rule very well, whereas the KCl–CaCl2–H2O system deviated slightly. The addition of NaCl to an aqueous solution of CaCl2 decreased its water activity for all CaCl2 molalities. However, KCl was found to decrease and increase the water activity at low and high CaCl2 molality, respectively. The turning point appears at 8.0 mol·kg–1 CaCl2 solution. The Pitzer–Simonson–Clegg (PSC) model was applied to represent the water activity of the two ternary systems, and the calculated results are discussed.
研究领域:
化学
·
物理化学
✓ 已验证
DOI
高影响因子
Energies
·
2026
·Vol. 19
·期 8
·1816
·
IF 3.9
Jie Miao,Xichen Yang,Yongkang Zhou,Hao Wang,Gongchang Peng
P2/O3-type Ni/Mn-based layered oxides are regarded as promising cathode materials for sodium-ion batteries (SIBs) because of their high energy density. However, their practical application is limited by low initial Coulombic efficiency, sluggish Na+kinetics, transition-metal dissolution/migration and irreversible phase transitions during cycling. Herein, a controlled P2 phase was achieved through elemental ratio regulation, enabling systematic synthesis of a series of NaxNi0.4Co0.1Mn0.5O2(x-NCMO) materials with tailored P2/O3 ratios. The optimized composition (x = 0.8), containing 16.6% P2 and 83.4% O3 phases, achieves an optimal phase equilibrium, thereby maximizing the synergistic coupling between the two layered polymorphs. This biphasic architecture demonstrates significantly enhanced Na+transport kinetics and exceptional electrochemical performance, high initial capacity of 168.65 mAh g−1and excellent rate performance, maintaining 84.88 mAh g−1at 10 C, outperforming most reported P2/O3 biphasic cathodes. Structural analysis and electrochemical analysis reveal that elemental ratio regulation modulates the TM–O electronic structure, promotes electronic transport, and accelerates Na+migration. These effects collectively reduce polarization, stabilize the structure, and thereby improve rate capability and long-term cycling capacity retention. This work provides an effective design strategy for designing high-performance layered oxide cathodes with improved structural and interfacial stability.
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Shiping Wang,Rui Huang,Kun Ren,Lushen Shen,Xiang Li,Ganchang Lei,Lijuan Shen,Yingying Zhan,Ying Zheng,Lilong Jiang
Although controlled-release fertilizer (CRF) is a safer and more efficient strategy to administer nutrients for plant growth, it is still a daunting task to reduce the cost and improve the degradability of the synthetic resin coatings. In this paper, an inorganic/organic composite coating for urea fertilizer was prepared from a biodegradable castor oil-based polyurethane (PU) filled with the layered Na-bentonite (Na-BT), which was ultrasonically treated by a series of green PEG surfactants . Synergistically influenced by various intercalation ability, cation-hosting ability and hydrophilicity of the PEGs, the porous structures of the modified Na-BT (MBT) fillers were simply tuned by varying the Mn molecular weights of the PEGs, resulting in the adjustable water swelling and mechanical properties of the MBT/PU composites. Moreover, it was confirmed that the water swelling property played a critical role in controlling the early stage of nutrient release, and the mechanical properties were important for the longevity of nutrient release from the CRFs. The best MBT/PU composite supported a CRF with a long-term release of 75 % in 38 days, which was much longer than the one based on pure PU (20 days).
✓ 已验证
产品关联
DOI
高影响因子
REPRODUCTIVE TOXICOLOGY
·
2023
·
IF 3.3
Kaiqi Chen,Xiaoqian Lu,Dan Xu,Yu Guo,Ying Ao,Hui Wang
Corn oil, sodium carboxymethyl cellulose (CMC-Na), and dimethyl sulfoxide (DMSO) are widely used as solvents or suspensions in animal experiments, but the effects of prenatal exposure to them on fetal development have not been reported. In this study, Kunming mice were given a conventional dose of corn oil (9.2 g/kg·d), CMC-Na (0.05 g/kg·d) or DMSO (0.088 g/kg·d) during gestation days 10–18, and the pregnancy outcome, fetal physical development, serum phenotype, and multi-organ function changes were observed. The results showed that corn oil decreased serum triglyceride level in males but increased their serum testosterone and CORT levels, and affected female placenta and female/male multi-organ functions (mainly bone, liver, kidney). CMC-Na increased female/male body lengths and tail lengths, decreased serum glucose and total cholesterol levels in males as well as increased their serum LDL-C/HDL-C ratio and testosterone level, decreased female serum bile acid level, and affected male/female placenta and multi-organ functions (mainly bone, liver, hippocampus). DMSO decreased male body weight and serum glucose level, decreased male/female serum bile acid levels, and affected male/female placenta and multi-organs functions (mainly bone, hippocampus, adrenal gland). In conclusion, prenatal exposure to a conventional dose of corn oil, CMC-Na or DMSO could affect fetal physical development and multi-organ functions, and has the characteristics of "multi-pathway, multi-organ and multi-target". This study provides the experimental basis for the rational selection of solvents or suspensions in pharmacology and toxicology studies.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Huiyan Wu,Hailong Huang,Lingzhi Cao,Yiyang Liu,Jianxing Dai,Cuilan Ren,Min Ge,Yuan Qian,Shuxian Hu,Xiaobin Fu,Hongtao Liu
In this study, it was demonstrated that Na+ ionic doped crystals could be formed during the solidification of FLiNaK melts. The ionic adulterating behavior between Li+, Na+, and K+ ions was investigated in detail by using various 1D/2D solid-state NMR methods and theoretical calculations. 2D 19F–23Na and 19F–7Li HETCOR NMR showed that the Na+ ions could be doped into LiF and KF crystals to generate new adulterating phases. Furthermore, the doped ionic Na+ ions exhibited different dynamics in LiF and KF crystals, which is correlated to the bonding length of the lattice and the Na–F coordinated interactions. This study provides more insights into the ionic doped crystal phase formation in such simple alkali metal fluorides, which may be of greater significance in the application as optical devices.
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2022
·Vol. 19
·期 4
·2205681
·
IF 15.153
Hui Gao,Jeongyeon Lee,Qixiao Lu,Yoonbin Kim,Kang Ho Shin,Ho Seok Park,Zhonghua Zhang,Lawrence Yoon Suk Lee
Potassium- and sodium-ion batteries (PIBs and SIBs) have great potential as the next-generation energy application owing to the natural abundance of K and Na. Antimony (Sb) is a suitable alloying-type anode for PIBs and SIBs due to its high theoretical capacity and proper operation voltage; yet, the severe volume variation remains a challenge. Herein, a preparation of N-doped carbon-wrapped Sb nanoparticles (L-Sb/NC) using pulsed laser ablation and polydopamine coating techniques, is reported. As the anode for PIB and SIB, the L-Sb/NC delivers superior rate capabilities and excellent cycle stabilities (442.2 and 390.5 mA h g −1 after 250 cycles with the capacity decay of 0.037% and 0.038% per cycle) at the current densities of 0.5 and 1.0 A g −1 , respectively. Operando X-ray diffraction reveals the facilitated and stable potassiation and sodiation mechanisms of L-Sb/NC enabled by its optimal core–shell structure. Furthermore, the SIB full cell fabricated with L-Sb/NC and Na 3 V 2 (PO 4 ) 2 F 3 shows outstanding electrochemical performances, demonstrating its practical energy storage application.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Fangya Qi,Lianyi Shao,Xiaoyi Lu,Guoping Liu,Xiaoyan Shi,Zhipeng Sun
Establishing heterostructure is an effective strategy to improve the cycling and rate properties of electrode due to high charge transfer kinetics. Nevertheless, it is still a great challenge to prepare a reasonable heterojunction material with appropriate electrochemical property as anode for Na/K ion batteries. In this work, a novel MXene derivative consisted of TiSe 2 /TiO 2 /C heterostructured hexagonal prism has been prepared by a simple solid phase sintering method to converting Ti 3 C 2 T x MXene to TiSe 2 /TiO 2 /C. In this composite, TiSe 2 and TiO 2 with different work functions can induce a built-in electric field in the heterojunction interface, accelerating the electrochemical courses. Serving as an anode material for Na ion batteries , TiSe 2 /TiO 2 /C can keep a discharge capacity of 280 mAh g −1 at 5 A g −1 after 1000 cycles and a superior rate capability with 212 mAh g −1 even at 10 A g −1 . Even using as anode for K ion batteries , TiSe 2 /TiO 2 /C can still retain a capacity of 121 mAh g −1 at 0.1 A g −1 after 800 cycles. This work supplies a simple approach to design metal oxide/selenide heterostructures toward Na/K ion batteries with excellent performance and promotes the application of MXene derivatives in the field of energy storage.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Yi-Tong Wang,Xiao-Man Wang,Di Gao,Fu-Ping Wang,Ya-Nan Zeng,Jun-Guo Li,Li-Qun Jiang,Qing Yu,Rui Ji,Le-Le Kang,Ya-Jun Wang,Zhen Fang
In this study, nanocatalysts for biodiesel production were prepared via wet impregnation of blast furnace dust (BFD) in Na 2 CO 3 (Na-BFD) and CaCO 3 (Ca-BFD) suspension solutions and calcination at 500 and 600 °C, respectively. Biodiesel yields of 100.0 wt% (Na-BFD 500 ) and 98.3 wt% (Ca-BFD 600 ) were achieved at 65 °C. Synthesized catalysts showed outstanding activity and recyclability, due to the transition of CaCO 3 , Na 2 CO 3 and Fe 2 O 3 to nanocrystals of NaFeO 2 (29.9 nm), Ca 2 Fe 2 O 5 (10.5 nm), CaO (100.1 nm) and Ca 2 Fe 2 O 5 (50.0 nm). Na-BFD 500 achieved 95.8 wt% biodiesel yield with 16 cycles, whereas Ca-BFD 600 reached 94.1 wt% biodiesel yield with 7 cycles via magnetic separation. BFD containing convertible magnetic and active components (Fe 2 O 3 and CaCO 3 ) was an ideal raw material to synthesize catalyst for biodiesel production with high catalytic efficiency and easy separation. The study provided a practical utilization of industrial solid waste for biodiesel production.
✓ 已验证
产品关联
DOI
高影响因子
ENERGY
·
2022
·
IF 8.857
Haifeng Jiang,Haipeng Liu,Jiaxin Dong,Jiaxing Song,Sunhua Deng,Jie Chen,Yu Zhang,Wenpeng Hong
Using cellulose to produce high-quality oxygenated fuels or chemicals is becoming an important way to replace chemical synthesis technology. In this work, the Ce–Co–Na ternary composite metal catalyst is synthesized and used for catalytic cracking of cellulose to prepare the ketone-rich bio-oil production. To construct an environment-friendly process, CO 2 is used as a pyrolysis reaction atmosphere to improve the enrichment of ketones. Strong synergistic effects among metal components effectively promote the thermal-cracking of cellulose to produce primary products (anhydrosugars), and further convert to oxygenates due to the excellent oxygen transferability of the catalyst. The introduction of CO 2 enhances the selectivity of ketones in the liquid product, especially 2,3-dimethyl-2-cyclopenten-1-one. The highest content of ketones in the liquid is 22.73%, which is about four times higher than that of the blank sample. In addition, the generation of CO in the syngas is promoted. This study provides an alternative way for the pyrolysis of biomass to prepare ketone platform compounds and syngas production .
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）