APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Guohua Zhu,Xiaoyan Zhang,Yongguang Liu,Fangbo Ma,Jing Suo,Ling Wang,Shan Liu
Layered oxide cathodes have attracted widespread attention due to their high-voltage and high discharge capacity. Nevertheless, the irreversible redox reactions of layered oxide cathode and decomposition of electrolyte at high-voltage greatly reduce the reversibility of the batteries. Herein, we employ a double-doping (Li&B) strategy to enhance the electrochemistry performance of the layered NaNi 0.3 Fe 0.3 Mn 0.4 O 2 (NNFM) cathode at high voltage. It proved that the dissolution of the transition metal can be restricted by double doping, and the irreversible phase transition is mitigated even at high voltage. As a result, battery with the double-doping cathode exhibits excellent electrochemistry performance, which achieves a capacity of 175 mAh g −1 at 0.2C, maintaining a capacity retention of approximately 87.3% over 100 cycles at 1C, and demonstrates exceptional rate performance. This work presents a novel insight into the doping technique for the high-performance cathode materials and offers a general method for the high energy Na-ion batteries.
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 6
·2184-2193
·
IF 5.7
Qingyang Ding,Jincheng Wu,Dechao Yu,Xinxin Han,Yayun Zhou,Tiantian Shen,Yunfeng Ma,Songlin Zhuang,Dawei Zhang
Broadband short-wave infrared (IR) phosphor-converted light-emitting diodes (pc-LEDs) are deemed as excellent light sources for miniature near-IR (NIR) spectroscopy but suffer from a lack of efficient phosphors with emission peaks >850 nm. Novel solid solution Mg4NbxTa2−xO9: 3%Cr3+ phosphors were developed for efficient Cr3+: 4T2(4F) → 4A2 transition at 920 nm with a large full-width at half-maximum of ∼164 nm. Benefiting from the synergistic effects of particle growth, higher crystallinity, and Li+ compensation, the NIR emission intensity of Cr3+ continuously increased with increasing Nb component and even reached twice the value for optimized Mg4Nb2O9: 3%Cr3+,Li+. The optimized sample featured a substantial internal quantum efficiency (QE) of ∼67.1% and an external QE of ∼26.1%. By combing a blue LED chip of ∼465 nm with the optimized phosphor, a self-built pc-LED was tested to exhibit relatively advanced performance, i.e., NIR output powers of 5.1 mW at 20 mA and 62.4 mW at 320 mA as well as a photoelectric efficiency of 10.3% at 20 mA. The broadband NIR pc-LED was successfully applied to clearly image objects behind a plastic cover and to recognize blood vessel distribution inside a human finger and fist. Further development of such Cr3+-activated phosphors (pc-LEDs) will greatly advance the technology of nondestructive safety detection and biomedical imaging, among others.
✓ 已验证
DOI
高影响因子
RSC Sustainability
·
2024
·Vol. 2
·期 12
·3999-4007
·
IF 0
Xin Mi,Jun Pan,Menglin Duan,Fuqiang Huang,Peng Qin
The development of photo-assisted rechargeable batteries is an attractive approach to realize the conversion and storage of solar energy in a single device, but designing bifunctional electrodes and improving their safety are challenging. Herein, we chose CsPbBr3 perovskites as the photo-responsive unit and lead phytate as the ion storage unit for the construction of a dual-functional cathode. The designed photo-cathode possessed enhanced photon responsiveness to benefit solar conversion and reversible redox centers for direct energy storage. Moreover, considering the safety of photo-assisted Li-ion batteries (PA-LIBs), a polymer-based electrolyte was used instead of a traditional liquid-based electrolyte to further restrict leakage and decomposition issues. During the photo-assisted charging and discharging processes (AM 1.5 G, 100 mW cm−2), the specific capacity of the assembled quasi-solid-state PA-LIB increased by 11.4% and 64.8%, respectively, compared with conventional electric charging and discharging, thus providing an efficient and sustainable strategy to realize solar-driven electrochemical energy storage.
✓ 已验证
DOI
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Yue Peng,Hongxin Liu,Yunfeng Li,Yan Song,Chengwei Zhang,Gongkai Wang
Lithium-ion hybrid capacitors (LICs) have gained increasing focus owing to their high energy/power densities. The development of anodes with superior rate capability is an effective way to surmount the kinetic mismatch between anodes and cathodes, and thus, enhancing the energy/power densities. Herein, Co 3 O 4 nanoparticles embedded in three-dimensionally (3D) ordered macro-/mesoporous TiO 2 (Co 3 O 4 @TiO 2 ) are synthesized through an in situ method from dual templates. Differing from the composite prepared by loading active nanoparticles on support, Co 3 O 4 nanoparticles are embedded in TiO 2 framework, which can improve the stability of the electrode. Furthermore, the hierarchically porous structure of TiO 2 is in favor of the rapid diffusion of ions and electrolyte. As a result, The Co 3 O 4 @TiO 2 -2 composite with an optimized Co 3 O 4 content (~25 wt%) delivers a high capacity of 944.1 mAh g −1 after 100 cycles at 0.1 A g −1 and high-rate capability (405.7 mAh g −1 after 1000 cycles at 5 A g −1 ). The LIC assembled with Co 3 O 4 @TiO 2 -2 anode and activated carbon (AC) cathode delivers high energy/power densities (maximum, 87.9 Wh kg −1 /10208.9 W kg −1 ) and great cycle stability (88.1%, 6000 cycles, 0.5 A g −1 ).
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Zhixin Ye,Feifei Zhong,Yunfei Chen,Zhimin Zou,Chunhai Jiang
Composite anode materials with a unique architecture of carbon nanotubes (CNTs)-chained spinel lithium titanate (Li 4 Ti 5 O 12 , LTO) nanoparticles are prepared for lithium ion capacitors (LICs). The CNTs networks derived from commercial conductive slurry not only bring out a steric hindrance effect to restrict the growth of Li 4 Ti 5 O 12 particles but greatly enhance the electronic conductivity of the CNTs/LTO composites, both have contributed to the excellent rate capability and cycle stability. The capacity retention at 30 C (1 C = 175 mA g −1 ) is as high as 89.7% of that at 0.2 C with a CNTs content of 11 wt%. Meanwhile, there is not any capacity degradation after 500 cycles at 5 C. The LIC assembled with activated carbon (AC) cathode and such a CNTs/LTO composite anode displays excellent energy storage properties, including a high energy density of 35 Wh kg −1 at 7434 W kg −1 , and a high capacity retention of 87.8% after 2200 cycles at 1 A g −1 . These electrochemical performances outperform the reported data achieved on other LTO anode-based LICs. Considering the facile and scalable preparation process proposed herein, the CNTs/LTO composites can be very potential anode materials for hybrid capacitors towards high power-energy outputs.
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Jiucong Liu,Mengdi Zhang,Di Zhang,Xizheng Liu
Lithium-ion batteries (LIBs) suffered from severe performance fading when operated at lower temperatures due to the increase of Li desolvation energy and the formation of Li dendrites on the anode surface. It is critically important to develop a suitable anode with higher capacity retention at lower temperatures for advanced LIBs. Herein, we report the fabrication of a composite anode by confining room-temperature liquid GaInSn alloys within a porous 2D-layered V2CTx MXene. This configuration combines the high capacity of liquid metal (LM) and high ionic conductivity of 2D V2CTx by confining self-healing LM within the V2CTx framework, resulting in enhanced long-term cycle performance (1174.6 mA h g–1 after 200 cycles at 200 mA g–1) and low-temperature performance (529.6 mA h g–1 after 100 cycles at −20 °C). Theoretical calculations disclose that the strong adsorption of V2CTx to LM ensures the stability of the composites. It also reveals that LM with a lower adsorption energy promotes the transportation of Li+. The LM nanodroplets buffer the volume change of V2CTx during charging/discharging and avoid electrode crushing. The expanded layers of V2CTx and the porous structure facilitate the Li-ion desolvation and transportation at lower temperatures, thus suppressing the performance fading. This work paves the way for the development of composite anodes for LIBs with high specific capacity toward low-temperature applications.
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Shuai Zhang,Shihao Li,Haiyan Zhang,Juanlang Guo,Xianggang Gao,Hongbing Shi,Fangyan Liu,Zeyu Huang,Simin Li,Zhian Zhang
Li-rich Mn-based layered oxides (LLOs) have emerged as one of the most promising cathode materials for the next-generation lithium-ion batteries (LIBs) because of their high energy density , high specific capacity, and environmental friendliness . These materials, however, have drawbacks such as capacity degradation, low initial coulombic efficiency (ICE), voltage decay, and poor rate performance due to irreversible oxygen release and structural deterioration during cycling. Herein, we present a facile method of triphenyl phosphate (TPP) surface treatment to create an integrated surface structure on LLOs that includes oxygen vacancies , Li 3 PO 4 , and carbon. When used for LIBs, the treated LLOs show an increased initial coulombic efficiency (ICE) of 83.6% and capacity retention of 84.2% at 1C after 200 cycles. It is suggested that the enhanced performance of the treated LLOs can be attributed to the synergetic functions of each component in the integrated surface, such as the oxygen vacancy and Li 3 PO 4 being able to inhibit the evolution of oxygen and accelerate the transport of lithium ions , while the carbon layer can restrain undesirable interfacial side reactions and reduce the dissolution of transition metals. Furthermore, electrochemical impedance spectroscopy (EIS) and galvanostatic intermittent titration technique (GITT) prove an enhanced kinetic property of the treated LLOs cathode, and ex-situ X-ray diffractometer shows a suppressed structural transformation of TPP-treated LLOs during the battery reaction. This study provides an effective strategy for constructing an integrated surface structure on LLOs to achieve high-energy cathode materials in LIBs.
✓ 已验证
DOI
高影响因子
Science Advances
·
2019
·Vol. 5
·期 1
·
IF 12.804
Ming Zhao,Zhiguo Xia,Xiaoxiao Huang,Lixin Ning,Romain Gautier,Maxim S. Molokeev,Yayun Zhou,Yu-Chun Chuang,Qinyuan Zhang,Quanlin Liu,Kenneth R. Poeppelmeier
Solid-state phosphor-converted white light-emitting diodes (pc-WLEDs) are currently revolutionizing the lighting industry. To advance the technology, phosphors with high efficiency, tunable photoluminescence, and high thermal stability are required. Here, we demonstrate that a simple lithium incorporation in NaAlSiO4:Eu system enables the simultaneous fulfillment of the three criteria. The Li substitution at Al sites beside Na sites in NaAlSiO4:Eu leads to an enhanced emission intensity/efficiency owing to an effective Eu3+ to Eu2+ reduction, an emission color tuning from yellow to green by tuning the occupation of different Eu sites, and an improvement of luminescence thermal stability as a result of the interplay with Li-related defects. A pc-WLED using the Li-codoped NaAlSiO4:Eu as a green component exhibits improved performance. The phosphors with multiple activator sites can facilitate the positive synergistic effect on luminescence properties.
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 22
·5828-5839
·
IF 7.779
Xiaoyan Xie,Jiaxiang Cui,Zhenkun Liu,Zhuo Yao,Xiaokai Ding,Chenyu Liu,Dong Luo
With the explosive growth of the electric energy storage industry, it is urgent to develop cathode materials with wide working voltage, high capacity, and low cost. Li-rich layered oxides have been in focus because they work stably in a voltage range of 2.0–4.8 V, deliver a reversible capacity of >300 mA h g−1 and can be Co-free. Nevertheless, the low initial Coulombic efficiency, inferior rate capacity, and rapid fading of the voltage and capacity stand in the way of their large-scale applications. Herein, we use citric acid to treat the surface of Li-rich layered materials. Citric acid not only dissolves the residual lithium compounds but also constructs a surface spinel layer with high crystallinity. In turn, the spinel layer protects the layered cathode from direct exposure to the electrolyte, improves the Li+ diffusion coefficient and suppresses the irreversible oxygen release. As a result, the citric acid-lithium rich sample possesses ultrahigh specific capacity (260 mA h g−1, while the pristine sample only possesses 207 mA h g−1) and initial Coulombic efficiency (>90%, 16% higher than that of the pristine sample). Even after 200 cycles, the citric acid-lithium rich sample possesses a high capacity of 202 mA h g−1 with a capacity retention of 81.7%. Furthermore, the voltage decay rate of the citric acid-lithium rich sample from the 10th to 200th cycle is nearly 1.42 mV per cycle, while that of the pristine sample is up to 2.06 mV per cycle. Briefly, this work provides a way to construct a surface stable oxygen frame, which is of great significance to the practical application of Li-rich layered oxide cathodes.
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Ziyang Dai,Jing Yu,Jiapeng Liu,Rong Liu,Qi Sun,Dengjie Chen,Francesco Ciucci
Solid-state Li-metal batteries are promising as next-generation energy storage devices. However, the main bottlenecks are the poor conductivity of the solid electrolyte and the high interfacial resistance . While polymers exhibit a lower interfacial resistance in comparison to ceramics, they often require the inclusion of flammable solvents. In this work, highly conductive composite polymer electrolyte (CPE) membranes are prepared by integrating a poly(vinylidene fluoride) matrix (PVDF) with a Li-conductive perovskite (i.e., Li 0.38 Sr 0.44 Ta 0.70 Hf 0.30 O 2.95 F 0.05 , LSTHF), a flame-retarding solvent (i.e., trimethyl phosphate (TMP)), and a Li salt (i.e., LiClO 4 ). The CPE membrane with 10 wt% LSTHF (CPE-10) exhibits conductivities as high as 0.53 mS cm −1 at room temperature (RT) and 0.36 mS cm −1 at 0 °C. Furthermore, prototype batteries , including the CPE-10 electrolyte, show high initial discharge capacities, good rate capabilities, and stable cycling performance at either RT or 5 and 60 °C. This study illustrates that including a Li-conductive perovskite and TMP in a PVDF-based polymer material could yield safe, high-performance quasi-solid-state Li-metal batteries capable of operating over a relatively wide temperature range.
✓ 已验证
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-10
·
IF 14.7
Su Han,Li Jingru,Zhong Yu,Liu Yu,Gao Xuhong,Kuang Juner,Wang Minkang,Lin Chunxi,Wang Xiuli,Tu Jiangping
Sulfides are promising electrolyte materials for all-solid-state Li metal batteries due to their high ionic conductivity and machinability. However, compatibility issues at the negative electrode/sulfide electrolyte interface hinder their practical implementation. Despite previous studies have proposed considerable strategies to improve the negative electrode/sulfide electrolyte interfacial stability, industrial-scale engineering solutions remain elusive. Here, we introduce a scalable Li-Al-Cl stratified structure, formed through the strain-activated separating behavior of thermodynamically unfavorable Li/Li 9 Al 4 and Li/LiCl interfaces, to stabilize the negative electrode/sulfide electrolyte interface. In the Li-Al-Cl stratified structure, Li 9 Al 4 and LiCl are enriched at the surface to serve as a robust solid electrolyte interphase and are diluted in bulk by Li metal to construct a skeleton. Enabled by its unique structural characteristic, the Li-Al-Cl stratified structure significantly enhances the stability of negative electrode/sulfide electrolyte interface. This work reports a strain-activated phase separation phenomenon and proposes a practical pathway for negative electrode/sulfide electrolyte interface engineering.
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2016
·Vol. 46
·期 7
·725-733
·
IF 2.223
Zhu Shaoyin,Yu Jiaojiao,Yan Xiao,Zhao Erqing,Wang Yanqing,Sun Deye,Jin Yongcheng,Kanamura Kiyoshi
Abstract A sulfur cathode with enhanced electrochemical properties is prepared by a hydrogel binder owning three-dimensional polymeric network for Li–S batteries. The promising high-performance binder (Alg-Ca 2+ ) is constructed by an in situ interconnection of alginate chains by additive divalent cation with a facile and self-assembly strategy. With the assistance of 3D network, the sulfur/activated carbon composite cathode exhibits a higher rate capability and cycling performance compared to poly(vinylidene fluoride) binder, and the capacity retention is up to 80.6 % after 200 cycles (0.5C, 1C = 1675 mA g −1 ). Additionally, the electrochemical impedance spectroscopy also reveals a lower electrode resistance and better kinetic characteristics with Alg-Ca 2+ as a binder. The improved electrochemical behaviors are assigned to the ability of maintaining the electrode stability due to the excellent mechanical property and amorphous structure. Graphical Abstract
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）