Materials Futures
·
2022
·Vol. 1
·期 4
·045102
·
IF 0
Ruijia Liu,Na Li,Enyue Zhao,Jinkui Zhao,Lingxu Yang,Wenjun Wang,Huijun Liu,Chaoliu Zeng
Transition metal nitrides (TMNs), including titanium nitride (TiN), exhibit remarkable application prospects as anodes for durable high-rate lithium-ion batteries (LIBs). Regrettably, the absence of simple synthesis methods restricts their further development. Herein, a facile and low-cost molten salt synthesis strategy was proposed to prepare carbon-anchored TiN nanoparticles as an advanced anode material for LIBs with high rate capabilities. This nanosized TiN obtained is ∼5 nm in size and well-distributed onto carbon plates, which could release a reversible capacity of ∼381.5 mAh g−1 at 0.1 A g−1 after 250 cycles and ∼141.5 mAh g−1 at 1.0 A g−1 after 1000 cycles. Furthermore, it was confirmed that the conversion reaction between TiN and Li-ions happened during the electrochemical reaction process, resulting in the formation of Li3N and Ti. This unique microstructure attributed from TiN nanoparticles anchored by carbon could support the structural volume during cycling. This work highlights the method superiority of TiN prepared via a molten salt synthesis strategy as an anode for LIBs with impressive rate performances.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
RARE METALS
·
2023
·Vol. 43
·期 2
·658-670
·
IF 8.8
Peng Jia-Qi,Wei Yuan-Yuan,Liu Dong-Ming,Li Yun,Hu Bin,Huang Bin,Yang Jian-Wen,Xiao Shun-Hua,Wang Ren-Heng
Ultra-high nickel layered oxide cathode material with high energy density is the most promising material to improve the electrochemical performance of lithium-ion batteries (LIBs). However, the poor structural stability and severe surface/interface side reactions of the material lead to poor rate performance and cyclic stability, which limits its application in practice. In this paper, the dual-modification strategy of Co doping and La 2 O 3 coating is used to meet the above challenges. Co doping can effectively widen layer spacing and reduce Li + /Ni 2+ mixing, and La 2 O 3 coating can effectively eliminate the residual alkali on the surface of active material, inhibit the thickening of cathode electrolyte interphase (CEI) film and reduce surface/interface side reactions. Therefore, the modified material (NM90-CL) with excellent electrochemical properties is achieved through the synergistic enhancement of Co doping and La 2 O 3 coating. Its capacity retention rate can reach 77.9% after 200 cycles at 1.0 °C and 75.7% after 200 cycles at 5.0 °C. Its reversible capacity can up to 153.5 mAh·g –1 at 10.0 °C. This dual-modification strategy will provide theoretical guidance and technical support for the synthesis of other high-performance electrode materials. Graphical abstract
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Yuexiu Du,Xiaowei Chi,Jiaqi Huang,Qiliang Qiu,Yu Liu
Aqueous rechargeable Zn batteries are attractive for emerging generations of large-scale energy storage due to their high safety, low cost, and high energy density . It is regrettable that the poor cycling performance limits its further commercialization due to the troublesome dendrite growth and short-circuiting issue of the traditional planar Zn anode. Herein, in this work, a three-dimensional porous Zn anode (3D ZnP/CF) composed of highly conductive carbon fiber-based network and active zinc powder fillers is designed for long lifespan aqueous Zn batteries . The new 3D ZnP/CF exhibits controlled deposition behavior and scarce short-circuiting benefiting from the fast ionic/electronic transfer and sufficient deposition space, which are enabled by the porous structure and conducting network of the anode. The symmetric cell based on 3D ZnP/CF exhibits small voltage hysteresis of 25.1 mV and extraordinarily long cycling stability of 3000 h, particularly excellent high-rate performance (8 mA cm −2 , 8 mA h cm −2 , 700 h), which is superior to those of the reported static Zn metal batteries. Furthermore, the assembled full cell with manganese oxide as cathode exhibits superb capacity retention of 93.2% over 7000 cycles. The structural and compositional design provides another effective approach for the commercialization of aqueous rechargeable Zn batteries.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2018
·
IF 3.886
Lihong Yu,Feng Lin,Lin Xu,Jingyu Xi
A phosphorous-doped graphite felt (PGF) is fabricated and examined as electrode for vanadium flow battery (VFB). P doping improves the electrolyte wettability of GF and induces more defect sites on its surface, resulting in significantly enhanced activity and reversibility towards VO 2+ /VO 2 + and V 2+ /V 3+ couples. VFB with PGF electrode demonstrates outstanding performance such as high-rate capability under 50–400 mA cm −2 , wide-temperature tolerance at −20 °C–60 °C, and excellent durability over 1000 charge–discharge cycles. These merits enable PGF a promising electrode for the next-generation VFB, which can operate at high-power and all-climate conditions.
研究领域:
能源化学
·
材料科学
·
电化学
·
储能技术
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Dongmei Dai,Dongwei Yan,Bao Li,Kun Chang,Zhaorong Chang,Hongwei Tang,Yanping Li,Shaoxiong Zhou
Li-rich layered oxide is one of the most promising cathode materials for high-energy-density Li-ion batteries (LIBs). The composition, structure and morphology of precursors have significant influence on the electrochemical performance of the final cathode material. The capacity and initial coulombic efficiency of Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 can be simultaneously improved by sintering a nanoplate precursor with Li 2 CO 3 in our previous work. Herein, the morphology and the formation mechanism of such nanoplate are investigated through a designed orthogonal tests. The optimal concentration of transition metal ions, 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid (HEPES) and polyvinyl pyrrolidone (PVP) are 0.1, 0.031 and 0.004 g mL −1 , respectively. The as-prepared Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 from optimal nanoplate demonstrate an improved discharge capacity (323.8 mAh g −1 at 20 mA g −1 ), initial coulombic efficiency (81.3%), and rate capability (195.8 mAh g −1 at 3C). This new precursor architecture opens a promising avenue for the development of high-performances cathode materials of LIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Haomiao Li,Kangli Wang,Shijie Cheng,Kai Jiang
Sodium-ion batteries (SIBs) are prospective alternative to lithium-ion batteries for large-scale energy-storage applications, owing to the abundant resources of sodium. Metal sulfides are deemed to be promising anode materials for SIBs due to their low-cost and eco-friendliness. Herein, for the first time, series of copper sulfides (Cu2S, Cu7S4, and Cu7KS4) are controllably synthesized via a facile electrochemical route in KCl–NaCl–Na2S molten salts. The as-prepared Cu2S with micron-sized flakes structure is first investigated as anode of SIBs, which delivers a capacity of 430 mAh g–1 with a high initial Coulombic efficiency of 84.9% at a current density of 100 mA g–1. Moreover, the Cu2S anode demonstrates superior capability (337 mAh g–1 at 20 A g–1, corresponding to 50 C) and ultralong cycle performance (88.2% of capacity retention after 5000 cycles at 5 A g–1, corresponding to 0.0024% of fade rate per cycle). Meanwhile, the pseudocapacitance contribution and robust porous structure in situ formed during cycling endow the Cu2S anodes with outstanding rate capability and enhanced cyclic performance, which are revealed by kinetics analysis and ex situ characterization.
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
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Shan Gao,Baozhao Shi,Jing Liu,Lijuan Wang,Chaoyi Zhou,Cuili Guo,Jinli Zhang,Wei Li
The nickel-rich cathode LiNi0.6Co0.1Mn0.3O2 (NCM613) is a promising cathode material but has poor cycle stability, especially at a high cutoff voltage. Aiming at modulating the unit cell parameters via heteroatom dopants while providing a lithium-ion conductor coating, in this work, boron-based-modified NCM613 has been synthesized with both LiBO2 coating and boron doping via a solid-state method. The optimal modified sample LBO-0.4 exhibits excellent cycle stability at room temperature (2.8–4.5 V) with a retention of 94.8% at 1 C after 100 cycles (versus 79.7% of the pristine sample LBO-0) and 70.7% at 5 C after 1000 cycles (versus a retention lower than 1% for LBO-0). The DLi+ values of LBO-0.4 are significantly higher than those of LBO-0, which is attributed to the enlarged crystal lattice volume generated by the incorporation of B3+ into NCM613. Combined with characterization by Ar sputtering-assisted XPS, TEM, XRD, etc., it is illustrated that LiBO2 coating and B3+ doping can synergistically enhance the electrochemical performance of the NCM613 at a high cutoff voltage, high temperature, and high rate. In addition, DFT calculations disclose that the boron dopant is preferential to locate in the interstice among three Ni atoms of the TM–O layer of NCM, which facilitates the formation of more amount Ni2+, leading to the improved electrochemical performance of NCM613. Such ion doping and surface coating strategy can provide useful guidance on the modification of other layered oxide cathode materials.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Ying Qi,Tao Zhang,Ningxiang Wu,Huarui Ding,Gongxun Yu,Jiabiao Lian,Li Xu,Jingxia Qiu,Sheng Li
Metal sulfides have been considered promising anode materials for sodium-ion batteries (SIBs) due to their high specific capacities. However, the poor electrical conductivity and sluggish electrochemical kinetics of metal sulfides are the critical factors that are limiting their applications. In this work, cobalt sulfides with heterostructures embedded in an N-doped carbon composite (CoS/Co9S8@NC) have been synthesized to further investigate Na+ diffusion in the SIBs. With contributions from the heterostructure, the N-doped carbon, and the unique morphology, the composite can deliver enhanced rate capability and cycling stability compared to Co9S8. This work depicts the change of Na+ diffusion under the influence of heterostructures, providing an effective strategy of material design for enhancing the electrochemical performance of sodium-ion storage.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Chunming Zheng,Xudong Hu,Xiaohong Sun,Seung Joon Yoo,Xin Li
Despite successful commercialization of graphite in lithium ion batteries (LIBs), it is still necessary to develop cost-efficient carbon materials with high capacity and rate capability. Here we report a nitrogen-rich (17.72 at%), hierarchically porous carbon (NHPC) produced by low-cost and large-scale synthetic method through spray granulation followed by pyrolysis under flowing NH 3. The synthetic approach featuring using low-cost raw materials (glycine as carbon/nitrogen source and NaCl as template) and industrial spray granulation shows promising application in commercial practice. Benefitting from the rich nitrogen doping and homogeneously porous structure, the NHPC delivers a reversible capacity as high as 1276.5 mA h g −1 at current density of 100 mA g −1 when used as anode for LIB. After 200 cycles at current density of 500 mA g −1 , a reversible capacity of 930.6 mA h g −1 remains without any capacity fading compared to the second cycle, showing good electrochemical performance. Even at higher current density of 2 A g −1 , a reversible capacity of 582.6 mA h g −1 is achieved, highlighting the superior rate capability compared with most reported carbon-based materials. The mechanism of lithium storage in NHPC is studied in depth by kinetic analysis to figure out the reason for the achieved much higher capacities and rate capability than the theoretical capacity (372 mA h g −1 , by forming LiC 6 ) and most reported ones. It is found that there exists considerable capacitive charge storage owing to the adsorbed lithium on the surface of carbon in NHPC, which resulted in the superior rate capability and cycling stability. Besides the adsorbed lithium (capacitive charge storage) and inserted lithium (by forming LiC 6 or LiC 6 @Li 4 C 3 N 4 ), deposited lithium in micropores is also found to contribute to achieving the high lithium storage of NHPC.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2012
·Vol. 1
·期 7
·2508-2514
·
IF 0
Jing Su,Xing-Long Wu,Jong-Sook Lee,Jaekook Kim,Yu-Guo Guo
A facile sol–gel approach combined with a carbon-coating technique via high-temperature thermally decomposing C2H2 has been developed for the synthesis of a Li3V2(PO4)3/C (LVP/C) cathode material employing the biomass of phytic acid as an eco-friendly phosphorus source. The effects of the carbon-coating on the structural, morphological and electrochemical properties of LVP have been investigated. Compared with pristine LVP, the LVP/C composite presents a higher discharge capacity of 127 mA h g−1 at 0.1 C, better rate capability and long-term cyclability in the voltage range of 3.0–4.3 V. Even at a high charge–discharge rate of 5 C, it can still deliver a reversible capacity of 107 mA h g−1 over 400 cycles without obvious fading, demonstrating great potential as a superior cathode material for lithium-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Litao Yu,Jun Liu,Xijun Xu,Liguo Zhang,Renzong Hu,Jiangwen Liu,Lichun Yang,Min Zhu
The MOFs (metal–organic frameworks) have been extensively used for electrode materials due to their high surface area, permanent porosity, and hollow structure, but the role of antimony on the MOFs is unclear. In this work, we design the hollow spheres Ni-MOFs with SbCl3 to synthesize NiSb⊂CHSs (NiSb-embedded carbon hollow spheres) via simple annealing and galvanic replacement reactions. The NiSb⊂CHSs inherited the advantages of Ni-MOFs with hollow structure, high surface area, and permanent porosity, and the NiSb nanoparticles are coated by the formed carbon particles which could effectively solve the problem of vigorous volume changes during the Li+ insertion/extraction process. The porous and network structure could well provide an extremely reduced pathway for fast Li+ diffusion and electron transport and provide extra free space for alleviating the structural strain. The NiSb⊂CHSs with these features were used as Li-ion batteries for the first time and exhibited excellent cycling performance, high specific capacity, and great rate capability. When coupled with a nanostructure LiMn2O4 cathode, the NiSb⊂CHSs//LiMn2O4 full cell also characterized a high voltage operation of ≈3.5 V, high rate capability (210 mA h g–1 at a current density of 2000 mA g–1), and high Coulombic efficiency of approximate 99%, meeting the requirement for the increasing demand for improved energy devices.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Research
·
2020
·Vol. 14
·期 4
·1218-1227
·
IF 8.183
Huang Pengfei,Zhang Shunlong,Ying Hangjun,Yang Wentao,Wang Jianli,Guo Rongnan,Han Weiqiang
Pillaring technologies have been considered as an effective way to improve lithium storage performance of Ti 3 C 2 T x MXene. Nevertheless, the pillared hybrids suffer from sluggish Li + diffusion kinetics and electronic transportation due to the compact multi-layered MXene structure, thus exhibiting inferior rate performance. Herein, the few-layered Ti 3 C 2 MXene (f-Ti 3 C 2 MXene) which is free from restacking can be prepared quickly based on the NH 4 + ions method. Besides, Fe nanocomplex pillared few-layered Ti 3 C 2 T x (FPTC) heterostructures are fabricated via the intercalation of Fe ions into the interlayer of f-Ti 3 C 2 MXene. The f-Ti 3 C 2 MXene which is immune to restacking can provide a highly conductive substrate for the rapid transport of Li + ions and electrons and possess adequate electrolyte accessible area. Moreover, f-Ti 3 C 2 MXene can efficiently relieve the aggregation, prevent the pulverization and buffer the large volume change of Fe nanocomplex during lithiation/delithiation process, leading to enhanced charge transfer kinetics and excellent structural stability of FPTC composites. Consequently, the FPTC hybrids exhibit a high capacity of 535 mAh·g −1 after 150 cycles at 0.5 A·g −1 and an enhanced rate performance with 310 mAh·g −1 after 850 cycles at 5 A·g −1 . This strategy is facile, universal and can be extended to fabricate various few-layered MXene-derived hybrids with superior rate capability.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 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）