Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 46
·26513-26523
·
IF 10.733
Peng Huang,Min Huang,Hai Hu,Yuan Zhong,Chao Lai,Shulei Chou
The push for high performing electronic devices with long battery lives has rapidly advanced the field of energy storage systems. Niobium oxides have stood out as promising candidates to improve the storage and rate performance of anodes in lithium- and especially sodium-ion batteries due to their larger interplanar lattice spacing and patulous framework. Herein, we report the first synthesis of a nanosized metal/metal oxide hybrid composite coated by N-doped carbon and anchored onto reduced graphene oxide (NbO/Cu@NC-RGO) through in situ carbonizing of Cu-doped polyoxoniobate precursors. The strong synergistic effects between the uniformly distributed NbO/Cu hybrid nanoparticles, the N-doped carbon coating layer, and graphene substrates not only ensure efficient electron and ion transport, but also boost pseudocapacitive charge storage. The resulting composite exhibits a maximum reversible charge capacity of 580 mA h g−1 after 100 cycles at a current density of 100 mA g−1 when utilized in lithium-ion batteries (LIBs), and 203 mA h g−1 when utilized in sodium-ion batteries (SIBs). For SIBs in particular, a long-lifetime of 1012 cycles is observed when cycled at a high current density of 800 mA g−1. This work represents a promising step forward in the design and preparation of metal oxide composite anodes for LIBs and SIBs.
研究领域:
材料科学
·
电化学
·
纳米能源
·
储能技术
·
无机化学
·
先进电池材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Yong Zhang,Ming Li,Shengkui Zhong,Yulei Sui,Xiaoping Zhang,Xinyu Li,Ling Wu
It is a great challenge to develop the cathode materials with high efficiency, long life and low-cost for lithium-sulfur batteries. In this paper, we design a simple hydrothermal method to synthesize MoS 2 wrapped the MOFs-derived N-doped carbon nanorods as an effective sulfur host to improve the electrochemical performance of lithium-sulfur batteries. In the hydrothermal process, the cubic zeolitic imidazolate framework-67 (ZIF67) particles are connected together to form nanorods , and MoS 2 nanosheets are wrapped on the surface of the nanorods. In this composite, the carbon nanorods derived from ZIF67 is the main host for S-loading, while N-doping can change the hybrid orbital form of carbon and significantly improve the chemical adsorption of polysulfide . The elemental cobalt and cobalt oxide derived from ZIF67 can improve the electronic conductivity and polarity of the composite. And MoS 2 coating layer can provide more active sites, accelerate the sulfur redox reactions and effectively restrain the shuttle effect. The synergetic effects of above-mentioned factors make the MoS 2 @CZIF67/S composite cathode material shows excellent electrochemical performance. The composite shows high reversible specific capacities of 1391.9 and 806.1 mAh g −1 at 0.1C and 1C rate, respectively, and exhibits a capacity retention of 70.5% after 400 cycles at 1C rate.
研究领域:
材料科学
·
电化学
·
纳米能源材料
·
储能技术
·
先进电池
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Xiaoxue Li,Keyu Xie,Long Song,Mengjia Zhao,Zhipan Zhang
The effective separation of photogenerated electrons and holes in photocatalysts is a prerequisite for efficient photocatalytic water splitting. CuInS2 (CIS) is a widely used light absorber that works properly in photovoltaics but only shows limited performance in solar-driven hydrogen evolution due to its intrinsically severe charge recombination. Here, we prepare hierarchical graphitic C3N4-supported CuInS2 (denoted as GsC) by an in situ growth of CIS directly on exfoliated thin graphitic C3N4 nanosheets (g-C3N4 NS) and demonstrate efficient separation of photoinduced charge carriers in the GsC by forming the Z-scheme system for the first time in CIS-catalyzed water splitting. Under visible light illumination, the GsC features an enhanced hydrogen evolution rate up to 1290 μmol g–1 h–1, which is 3.3 and 6.1 times higher than that of g-C3N4 NS and bare-CIS, respectively, thus setting a new performance benchmark for CIS-based water-splitting photocatalysts.
研究领域:
材料化学
·
光催化
·
能源化学
·
纳米材料
·
可持续能源
·
半导体物理
·
表面科学
✓ 已验证
DOI
高影响因子
Science China-Materials
·
2021
·Vol. 65
·期 1
·43-50
·
IF 8.273
Xu Jingyi,Lai Chenling,Duan LiPing,Zhang Yuxuan,Xu Yifan,Bao Jianchun,Zhou Xiaosi
Transition-metal compounds have received extensive attention from researchers due to their high reversible capacity and suitable voltage platform as potassium-ion battery anodes. However, these materials commonly feature a poor conductivity and a large volume expansion, thus leading to underdeveloped rate capability and cyclic stability. Herein, we successfully encapsulated ultrafine CoP and CoSb nanoparticles into rich N-doped carbon nanofibers (NCFs) via electrospinning, carbonization, and phosphorization (antimonization). The N-doped carbon fiber prevents the aggregation of nanoparticles, buffers the volume expansion of CoP and CoSb during charging and discharging, and improves the conductivity of the composite material. As a result, the CoP/NCF anode exhibits excellent potassium-ion storage performance, including an outstanding reversible capacity of 335 mA h g −1 , a decent capacity retention of 79.3% after 1000 cycles at 1 A g −1 and a superior rate capability of 148 mA h g −1 at 5 A g −1 , superior to most of the reported transition-metalbased potassium-ion battery anode materials.
研究领域:
材料科学
·
电化学储能
·
纳米材料
·
能源化学
·
功能纤维材料
·
先进电池技术
✓ 已验证
DOI
高影响因子
Frontiers in Chemistry
·
2022
·
IF 5.545
Ling Meng,Zhaoxia Sun,Guanghang Sun,Xiting Zhang,Meng Dan,Jin Long,Jian Hu
Herein, we reported that KOH impregnation can generate a large number of porous structures with fruitful nitrogen self-doped groups during the carbonized process for poly (p-phenylene terephthalamide) fiber and poly (p-phenylene benzobisoxazole) fiber (denoted as PPTA and PBO, respectively). The intrinsical insulation, volume change, and shuttle effect of polysulfides then can be more significantly improved for the PBO-coated separator than the PPTA case. The discharge capacity primary achieves 1,322 mA h/g, which retains 827 mA h/g even after 200 cycles at 0.2 C for the cell with PBO-coated separator. The reversible specific discharge capacity maintains 841 mA h/g with a Coulomb efficiency of 99.7% at 5 C. The nitrogen self-doped nanocarbon particles are etched by KOH with the simple one-step preparation, which has promising application as Li-S battery cathode.
研究领域:
电化学
·
能源材料
·
纳米材料科学
·
电池技术
·
功能高分子材料
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Lixi Yang,Defeng Yin,Yanxia Zheng,Yubo Yang,Yuchao Li,Jinguo Hao,Bing Ai,Tingting Ge,Cuncun Zuo,Xiaobin Wang,Qian Wang,Ming Wang,Haofei Huang
A series of cobalt-nitrogen modified catalysts were prepared and applied to the degradation of phenol . The Mott Schottky catalyst (CoO/NGr@C) with high pyridine nitrogen content was designed to activate potassium peroxodisulfate (PDS) to generate active free radicals for phenol degradation. The structural properties of the materials are analyzed by XPS , TEM and then the charge density calculation is performed by DFT, which proves the existence of the highly active interface effect. Co–N-C MCM-41 can only degrade phenol into benzoquinone and it is difficult to achieve further degradation of benzoquinone, while the modified CoO/NGr@C can achieve deep mineralization of the intermediate benzoquinone through UV spectrum. EPR was used to prove that both hydroxyl radicals and sulfate radicals exist in the degradation process of phenol. Through the DFT simulation calculation of the material, it is proved that the existence of carbon activated by nitrogen and the electron rearrangement between cobalt and nitrogen-rich carbon lead to the catalytic activity of the material. The degradation conditions of phenol were optimized and the reaction kinetics of further phenol degradation were studied. The activation energy of phenol degradation on CoO/NGr@C is calculated to be 34.38 kJ mol −1 .
研究领域:
环境化学
·
催化科学
·
材料科学
·
物理化学
·
环境污染治理
·
自由基反应机制
·
理论计算化学
✓ 已验证
DOI
高影响因子
CARBON
·
2019
·
IF 7.466
Peng Xu,Qiuming Gao,Li Ma,Zeyu Li,Hang Zhang,Hong Xiao,Xiao Liang,Tengfei Zhang,Xuehui Tian,Chenhao Liu
The high quality carbonaceous material with high surface area and low charge transfer resistance is vital for assembling the advanced supercapacitor . Herein, a novel kind of N-doped holey graphene aerogel (NHGA) is prepared. The NHGA has high specific BET surface area of 446 m 2 g −1 and low charge transfer resistance of 0.4 Ω. A large specific capacity of 318.3 F g −1 is obtained at 0.5 A g −1 in a three-electrode configuration in 6 M KOH electrolyte, indicating the high capacity characteristic. As to the NHGA based symmetrical supercapacitor , the specific capacity of 96.0 F g −1 can be achieved at 200 A g −1 , presenting its robust rate property. After 10,000 cycles at 2 A g −1 , the specific capacity is 262.5 F g −1 with the capacity retention of 98.4%, showing its excellent cyclic stability. Notably, the energy density of 60.3 Wh kg −1 superior to that of the related typical reported supercapacitors, is obtained at the power density of 0.9 kW kg −1 in a non-flammable ionic liquid EMIMTFSI-80 electrolyte, which is effective from 20 to 100 °C. Thus, the advanced electrochemical property of NHGA is distinctly valuable for the supercapacitor utilization especially in the extremely conditions such as fire safety and/or high temperature.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
功能材料
✓ 已验证
DOI
高影响因子
Frontiers in Chemistry
·
2019
·
IF 3.782
Jingjing Yang,Xun Wang,Gai Zhang,Aijie Ma,Weixing Chen,Le Shao,Chao Shen,Keyu Xie
Solid composite polymer electrolytes are the optimal candidate for all solid-state lithium batteries, because of their enhanced ionic conductivities, long-life cycle ability and compatibility to lithium anode. Herein, we reported a kind of solid composite polymer electrolyte comprised of poly(ethylene oxide), graphitic-like carbon nitride and lithium perchlorate, which was prepared by a facile solution blending method. Microstructure of the solid composite polymer electrolyte was regulated by thermal annealing and interaction among components and was characterized by XRD, DSC, FTIR-ATR, and ROM. The obtained solid composite polymer electrolyte achieved an ionic conductivity as high as 1.76 × 10−5 S cm−1 at 25°C. And the electrochemical stable window and the lithium ion transference number, t+, were also obviously enhanced. LiFePO4/Li solid-state batteries with the annealed PEO-LiClO4-g-C3N4 solid polymer electrolyte presented a high initial discharge capacity of 161.2 mAh g−1 and superior cycle stability with a capacity retention ratio of 81% after 200 cycles at 1C at 80°C. The above results indicates that the thermal annealing treatment and g-C3N4 as a novel structure modifier is crucial for obtaining the high-performance solid composite polymer electrolytes used in the all solid-state lithium battery.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
固体离子学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2016
·Vol. 46
·期 6
·1803-1810
·
IF 4.177
Ganesan Anandhababu,Syed Comail Abbas,Jiangquan Lv,Kui Ding,Qin Liu,Dickson D. Babu,Yiyin Huang,Jiafang Xie,Maoxiang Wu,Yaobing Wang
Progress in the development of efficient electrocatalysts for oxygen reduction reactions is imperative for various energy systems such as metal–air batteries and fuel cells. In this paper, an innovative porous two-dimensional (2D) poly-iron–phthalocyanine (PFe–Pc) based oxygen reduction electrocatalyst created with a simple solid-state chemical reaction without pyrolysis is reported. In this strategy, silicon dioxide nanoparticles play a pivotal role in preserving the Fe–N4 structure during the polymerization process and thereby assist in the development of a porous structure. The new polymerized phthalocyanine electrocatalyst with tuned porous structure, improved specific surface area and more exposed catalytic active sites via the 2D structure shows an excellent performance towards an oxygen reduction reaction in alkaline media. The onset potential (E = 1.033 V) and limiting current density (I = 5.58 mA cm−2) are much better than those obtained with the commercial 20% platinum/carbon electrocatalyst (1.046 V and 4.89 mA cm−2) and also show better stability and tolerance to methanol crossover. For practical applications, a zinc–air (Zn–air) battery and methanol fuel cell equipped with the PFe–Pc electrocatalyst as an air cathode reveal a high open circuit voltage and maximum power output (1.0 V and 23.6 mW cm−2 for a methanol fuel cell, and 1.6 V and 192 mW cm−2 for the liquid Zn–air battery). In addition, using the PFe–Pc electrocatalyst as an air cathode in a flexible cable-type Zn–air battery exhibits excellent performance with an open-circuit voltage of 1.409 V. This novel porous 2D PFe–Pc has been designed logically using a new, simple strategy with ultrahigh electrochemical performances in Zn–air batteries and methanol fuel cell applications.
研究领域:
电化学
·
能源材料
·
催化化学
·
纳米材料
·
金属-空气电池
·
燃料电池
·
功能高分子材料
✓ 已验证
DOI
高影响因子
HIGH PERFORMANCE POLYMERS
·
2025
·
IF 1.6
Xiao Han,Zhe Gao,Zipeng Wang,Ruidong Zheng,Rui Chen,Li Feng
An effective nitrogen-phosphorus synergetic flame-retardant additive was designed with nitrogen-rich 3,5-Diamino-1,2,4-triazole and DOPO. With the help of CCl4, CH2Cl2 and triethylamine, target product diamine-phosphaferrocene-oxide (DD) was successfully synthesized. Equipped with DD of 0.92 g, epoxy resin mould of 25 g succeeded in vertical combustion test with rating of UL-94 V-0. In respect of limiting oxygen index, the value of mould was improved to 32.5%. The introduction of DD also had a significant impact on other parameters during the combustion of EP. For instance, peak of heat release rate of EP/3.5%DD mould was 746 kW/m2, which was 70.2% of EP mould without flame retardants. Total heat release of EP/3.5%DD mould was also dramatically decreased. All these details demonstrated that DD performed effectively in test of fire resistance. Besides, mechanical strength of EP mould was also improved by DD, of which izod iMPact strength of EP/3.5%DD was dramatically increased to 33 kJm-2. Meanwhile, tensile strength and flexural strength of EP/3.5% DD was 99 MPa and 112 MPa, which was 119.2% and 128.7% of EP mould, respectively. In the end, SEM, IR, XPS and Raman was utilized to study the flame-retardant mode of DD.
研究领域:
高分子材料科学
·
阻燃化学
·
材料力学
·
分析化学
·
复合材料工程
✓ 已验证
DOI
高影响因子
ChemCatChem
·
2016
·Vol. 8
·期 12
·2128-2135
·
IF 4.724
Kui Li,Xin Xie,Wei-De Zhang
A facile strategy to synthesize porous graphitic carbon nitride with stacking nanotubes by thermal condensation of melamine–ammonium oxalate stacking sheets is reported. The photocatalytic generation rate of hydrogen over the porous graphitic carbon nitride (99.7 μmol h −1 ) is nearly 9.5 times as that of pristine g-C 3 N 4 (10.5 μmol h −1 ). Such enhancement is attributed to the large specific surface area (91.1 m 2 g −1 ), improved visible-light absorption and efficient separation of photogenerated electrons and holes. The strategy of preparing the porous graphitic carbon nitride with modified melamine as a precursor opens a new gate for the regulation of the morphologies of g-C 3 N 4 to get higher photocatalytic activity. Graphical Curled up : Porous graphitic carbon nitride nanotubes were prepared by thermal condensation of melamine–ammonium oxalate (MAO) stacking sheets, which display high and stable activity for photocatalytic generation of hydrogen through water splitting.
研究领域:
材料科学
·
光催化
·
纳米材料
·
能源化学
·
半导体催化
·
水裂解制氢
·
功能材料
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2019
·
IF 5.162
Bo Lv,Sha Zeng,Wei Yang,Jian Qiao,Chao Zhang,Chengfeng Zhu,Minghai Chen,Jiangtao Di,Qingwen Li
Recently, the development of high-performance bifunctional oxygen catalysts integrated with flexible conductive scaffolds for rechargeable metal-air batteries has attracted considerable interest, driving by fast-growing wearable electronics . Herein, we report a flexible bifunctional oxygen catalyst thin film consisting of Co–N–C bifunctional catalysts embedding in carbon nanotube (CNT) networks. The catalyst is readily prepared by pyrolysis of cobalt-based zeolitic imidazolate frameworks (ZIF-67) that are in-situ synthesized in CNT networks. Such catalyst film demonstrates very high catalytic activities for oxygen reduction (onset potential: 0.91 V, and half-wave potential: 0.87 V vs. RHE) and oxygen evolution (10 mA cm −2 at 1.58 V) reactions, high methanol tolerance property, and long-term stability (97% current retention). Moreover, our integrated catalyst film shows very good structure flexibility and robustness. Based on the obtained film air electrodes, flexible Zn–air batteries demonstrate low charging and discharging overpotentials (0.82 V at 1 mA cm −1 ) and excellent structure stability in the bending tests . These results indicate that presently reported catalyst films are potential air electrodes for flexible metal–air batteries.
研究领域:
材料科学
·
电化学
·
纳米能源
·
先进功能材料
·
可再生能源
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）