JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Qing Li,Dan Zhao,Shijie Sun,Xing Zhang,Yu Zhang,Chao Li,Yifeng Cheng,Jincang Zhang,Renchao Che
The ultrathin multi-nanolayered structure with ultrathin monolayer thickness (<10 nm) and certain interlayer spacing can significantly shorten Li + paths and alleviate the volume effect for Li + -storage materials. However, unlike layered materials such as MXene and MoS 2 , shear ReO 3 -type niobates have difficulty forming ultrathin multi-nanolayered structures due to their crystal structures, which still remains a challenge. Herein, by a polyvinylpyrrolidone (PVP)-assisted solvothermal method , we first synthesize ultrathin multi-nanolayered Cu 2 Nb 34 O 87−x with oxygen vacancies composed of ultrathin nanolayers (2–10 nm in thickness) and interlayer spacing (1–5 nm). Oxygen vacancies can radically enhance the inherent electronic/ionic conductivity and Li + diffusion coefficient of this material. The PVP-induced formation mechanism of this material is expounded in detail. The well-preserved ultrathin multi-nanolayered structure and excellent multi-electron electrochemical reversibility (Nb 5+ ↔ Nb 4+ ↔N b 3+ and Cu 2+ ↔ Cu + ) of this material during cycling are fully verified. Based on an ultrathin multi-nanolayered structure and oxygen vacancies, this material as the anode of lithium-ion batteries is highly competitive among reported shear ReO 3 -type Cu-Nb-O anodes, displaying a high reversible capacity (315.3 mAh g −1 after 300 cycles at 1 C), durable cycling stability (85.7 % capacity retention after 1000 cycles at 10 C), and outstanding rate performance. Moreover, the application of this material to lithium-ion capacitors generates a large energy density (97.9 Wh kg −1 at 87.5 W kg −1 ) and a high power density (17,500 W kg −1 at 12.6 Wh kg −1 ), thus further indicating its fast faradaic pseudocapacitive behavior for practical applications. The results of this work indicate a breakthrough in synthesizing ultrathin multi-nanolayered shear ReO 3 -type niobates.
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高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·
IF 2.5
Feng Xingyi,Zeng Yingping,Yan Deen,Zou Hanbo,Yang Wei,Chen Shengzhou
Due to its high energy density and better safety performance, all-solid-state lithium batteries are regarded as important energy storage devices to replace the traditional liquid electrolyte Li-ion batteries. However, the problems of poor wettability of Li metal anode | solid-state electrolyte interface and easy growth of lithium dendrite have not been well solved. Here, we have constructed Fe-doped Li 7-3x Fe x La 3 Zr 2 O 12 (Fe-LLZO) and Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 (LLZTO) garnet-type double-layer solid electrolyte. The high density of Li 7-3x Fe x La 3 Zr 2 O 12 electrolyte and its interfacial wettability to Li metal not only effectively reduced the interface impedance between Li and solid electrolyte but also could stably cycle for more than 200 h without the growth of lithium dendrites at the rate of 0.1 mA cm −2 . In addition, the all-solid-state lithium battery (Li|Fe 0.1 -LLZO|LLZTO|LFP) with LiFePO 4 as a cathode also showed excellent cycle stability and C-rate performance.
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MATERIALS LETTERS
·
2023
·
IF 3
Zhengquan Zhang,Yuling Wang
The micro-nano structures were successfully fabricated on Al-Li alloy by adjusting the concentration of sodium formate and controlling the hydrothermal temperature though hydrothermal treatment. The growing directions and morphologies for micro-nano structures were studied. The results show the micro-nano structures were a mixture of AlOOH and Al(OH) 3 with good crystallinity, the intensity of diffraction peaks increases with the increase of sodium formate concentration, and the growing direction of micro-nano structure varied from (2 0 0) at 110 °C and 130 °C to (1 1 1) at 150 °C. The morphologies of the micro-nano structures exhibit patterned surface with overlapping leaf-like nano-plates at 110 °C and 130 °C, nordstandite is predominant, flower-like at 150 °C,aluminum oxide hydroxide is predominant.These findings directly demonstrate that the preferential growing direction and the morphologies of micro-nano structure has been confirmed with the concentration of sodium formate and the hydrothermal temperature.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Ming Jin,Rui Gao,Guiru Sun,Haibo Li,Xiangxin Xue,Chaoqun Qu,Nan Li,Yuting Zhang,Zhao Wang,Ming Feng
Lithium sulfide (Li 2 S) compounds as cathode materials for Lithium-sulfur (Li-S) battery have attracted more and more attention recently because of its high specific capacity, lower volume expansion and higher thermal stability of Li 2 S. However, high electrochemical barrier of the Li 2 S cathode and “shuttle effect” from S species on anode still block the development of Li-S batteries. Herein, LiFePO 4 (LFP) is employed as dual-function separator modifier to establish hybrid cathode. The modified separator will reduce overpotential for effective and durable sulfur redox reactions at the same time, it can also efficiently immobilize the lithium polysulfides (LiPSs) through the Lewis acid-base interaction of LiPSs and LFP. The battery systems based on the as-developed LFP modified separator exhibit an excellent rate capability, high sulfur utilization and outstanding cycling performance. The capacity retention can reach 83.9% after 400 cycles at 0.2 C, and the capacity can reach 594 mAh g −1 at up to 2 C. Current facile and low-cost strategy to modified Li-S battery systems on one hand offers an effective pathway to enhance electrochemical performance, on the other hand inspire new strategies on reducing the activation barrier of Li 2 S for improved sulfur electrochemistry as well.
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JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Mingming Xie,Xiaobo Zhu,Danqing Li,Zhizhao Xu,Yingjia Huang,Huanyi Zha,Mei Ding,Chuankun Jia
Along with the surging demand for rechargeable alkali-ion (Li + , Na + , or K + ) batteries , cost and availability of the battery materials become critical. In this paper, we report the use of spent asphalt , which is widely available and even poses environmental risks, to produce a high-performing universal Li/Na/K-ion host material. Taking advantage of a nano-Fe 2 O 3 template, the spent asphalt is converted into mesoporous carbon with an interconnected three-dimensional porous structure , high surface area, and numerous crystal defects . As an anode material for Li-ion batteries, the mesoporous carbon exhibits a reversible capability of 674.2 mA h g −1 at 0.2 A g −1 as well as excellent rate and cycling performance (258.7 mA h g −1 at 1.0 A g −1 after 1000 cycles) owing to the shortened diffusion path of ion and easier penetration of electrolytes. The carbon anode also delivers superior reversible capacities and cycling stability in Na-ion and K-ion batteries. With the potential to simultaneously tackle energy and environmental problems, the spent asphalt-derived mesoporous carbon is promising for large-scale applications.
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GREEN CHEMISTRY
·
2021
·Vol. 23
·期 16
·6090-6100
·
IF 10.182
Xinxin Wang,Wu Tang,Yang Hu,Wenqiang Liu,Yichao Yan,Liang Xu,Cong Fan
An insoluble small-molecule organic compound [N,N′-bis(2-anthraquinone)]-perylene-3,4,9,10-tetracarboxydiimide (PTCDI-DAQ) can be a high-performance cathode in Li-ion batteries (LIBs). In half cells, PTCDI-DAQ delivers a peak specific capacity of 229 mA h g−1, along with the good retention of 82% over 3 months. Meanwhile, PTCDI-DAQ can still hold a capacity of 46 mA h g−1 at 25 A g−1. By using the reduced state (Li4TP) of lithium terephthalate (Li2TP) as an organic anode in the all-organic Li-ion batteries (OLIBs), our OLIBs can realize a high-energy density of 296 W h kg−1cathode in the voltage range of 0.2–3.2 V and fulfill a long lifespan over 20 000 cycles. To the best of our knowledge, the comprehensive performance of our PTCDI-DAQ II Li4TP OLIBs is currently one of the best pure-organic LIBs in the world.
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Inorganic Chemistry Frontiers
·
2021
·Vol. 8
·期 14
·3473-3481
·
IF 6.569
Mili Liu,Hui Liu,Kang Chen,Jiangyong Sun,Hui Wang,Jiangwen Liu,Liuzhang Ouyang
The potential of a multiphase Al–Li alloy with the unreported Al1.08Li1.92 phase for use as a hydrolytic material to produce hydrogen was studied. This alloy enabled rapid hydrogen release in a wide temperature range with robust hydrogen yield. It could produce 1496 ml H2 per g within merely 0.5 min at 299 K and release 1076 ml H2 per g in 0.5 min even at a subzero temperature of 243 K. The hydrogen production kinetics were confirmed with a chemical step and could be well controlled by tailoring the solution components of water/ethanol mixtures. Furthermore, the alloy showed good air-resistance ability, indicating its suitability for safe handling and transport in practical applications. Our results confirmed the excellent hydrogen production achieved using this Al-based generation system. It might shed light on the progress of hydrogen production technologies for commercial use.
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APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Ge Zhang,Zhengyi Qian,Ya Mao,Baoyu Sun,Pengjian Zuo,Yulin Ma,Chunyu Du,Geping Yin,Jingying Xie
Porous carbon materials are usually employed as cathode catalysts in Li-O 2 batteries. However, the poor catalytic performance of carbon cathode often results in low capacity and severe overpotential. Herein, we successfully prepared phosphorus doped carbon material by one-step pyrolyzation, effectively improving the performance of Li-O 2 batteries. The discharge capacity of Li-O 2 battery with P doped carbon reaches 3400 m Ah g −1 at 200 mA g −1 , which is increased by 52% compared to the un-doped sample. Besides, greatly decreased discharge overpotential and enhanced rate capability are also obtained after phosphorus doping. Furtherly, phosphorus doping was found to crucially affect the growth of discharge products, and the solution driven mechanism becomes more prominent, leading to larger sized discharge products and prolonged battery life. Our work provides a new way of improving the catalytic performance of carbon cathode for Li-O 2 batteries.
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ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Chao Liu,Yan-Qing He,Li Deng,Jun-Tao Li,Shi-Gang Sun,Xiao-Cun Liu,Wen-Jie Tan,Bo Li,Sheng-Qing Xia
Germanium nanomaterials are important for their potential applications in many fields. However, current synthetic technologies usually involve either high-cost explosive reagents or complicated facilities, which make the mass production especially challenging. In this report, a method was developed to synthesize nano-Ge materials conveniently, realized by decomposing LiZnGe in air at room temperature. The process is nontoxic, inexpensive, and, most of all, very suitable for large-scale production in combination with ball milling. The as-prepared Ge nanomaterials are crystalline whose structures can be flexibly tuned through the ball milling syntheses. As the lithium-ion battery anode, such Ge nanomaterials exhibited long-term cycle ability with high specific capacity as well as excellent rate performance. These results not only provided a very efficient way to prepare nano-Ge in lab or even promising industry production but also suggested a universal method in synthesizing the tetrels elemental nanomaterials.
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Journal of Materials Chemistry A
·
2020
·Vol. 9
·期 3
·1812-1821
·
IF 11.301
Nan Zhang,Chuangchao Sun,Yiqiang Huang,Chunnan Zhu,Zunchun Wu,Ling Lv,Xiuquan Zhou,Xuancheng Wang,Xuezhang Xiao,Xiulin Fan,Lixin Chen
Sn metal is believed to be one of the most promising alternative anodes to commercial graphite thanks to the high theoretical capacity and abundant storage. However, large volume change results in pulverization of the bulk electrode, which is more serious in microsized particles, leading to rapid capacity degradation. Therefore, microsized Sn was never successfully applied as the anode for Li-ion batteries. Herein, we report that the as-received Sn microparticles (325 mesh, or ∼45 μm) could be directly used as anodes for LIBs in 2.0 M LiPF6 2-MeTHF or 2.0 M LiPF6 THF/2-MeTHF electrolyte, delivering a high capacity of ∼750 mA h g−1, initial coulombic efficiency of >90%, average cycling coulombic efficiency of ∼99.9%, and capacity retention of 84.1% after 400 cycles at a rate of 2C. This work demonstrated that alloying anodes could be realized by exploring compatible electrolytes and forming compact SEI layers, representing a breakthrough for commercialization of LIBs based on alloying anodes.
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CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Dan Xu,Wenjie Zhao,Wenping Cao,Weili Li,Weidong Fei
The lead-free BiFe 1- x (Li 0·5 Nb 0.5 ) x O 3 ceramics with x = 0.00, 0.01, 0.02, 0.04, 0.06, and 0.08 were modified by Li/Nb co-doping. X-ray diffraction measurements indicated that all the ceramics had a rhombohedral distorted perovskite structure and secondary phases appeared when x = 0.00, 0.04, and 0.06. The BiFeO 3 ceramics with a small amount of Li/Nb co-doping exhibited improvements in the remnant polarization (2 P r ) and ferroelectric P - E loop shape compared with the results of pure BiFeO 3 (BFO). The decreased dielectric loss and leakage current indicated that proper Li/Nb co-doping for the Fe-site in BFO was a promising route to improve the leakage behavior and enhance the resistivity. These improved electrical properties were related to the reduction of oxygen vacancies and suppression of the formation of Fe 2+ . The leakage mechanism was also discussed and analyzed.
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JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Jinghao Huo,Yujia Xue,Xiaofei Wang,Yi Liu,Lifeng Zhang,Shouwu Guo
Hybrid Li-ion capacitors (LICs) are a new kind of electrochemical energy storage device with high energy and power densities. In this work, phosphorus-doped TiO 2 /phosphorus-doped carbon nanofibers (PTO/PC NFs) are fabricated through a simple electrospinning method with disodium hydrogen phosphate as a phosphorus source. Differing from the PTO prepared by hydrothermal method , sol-gel method or calcining treatment at phosphorous atmosphere. The P-doping evenly distributed in PTO/PC NFs and PTO nanoparticles are embedded in PC, which improves the conductivity, structure stability and Li + ions diffusion of TiO 2 . As a result, the PTO/PC NFs anode shows high capacities of 329 and 150 mA h g −1 (0.1 and 2 A g −1 ), long cycle life (201 mA h g −1 after 1000 cycles at 1 A g −1 , 69 mA h g −1 after 1000 cycles at 5 A g −1 ), and superior pseudocapacitance (87%, 2 mV s −1 ). Furthermore, the LICs assembled with PTO/PC NFs anode and AC cathode show outstanding capacity of 35 F g −1 at a current density of 0.1 A g −1 , high energy density of 72 Wh kg −1 at the power density of 250 W kg −1 , and cycle stability (54%, 10 000 cycles, 1 A g −1 ). This suggests that PTO/PC NFs is a potential anode material for high-performance LICs.
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