IONICS
·
2023
·Vol. 30
·期 2
·697-708
·
IF 2.8
Wang Guanzheng,Lei Huazhi,Wang Zheng,Yuan Zhentao,Zhan Zhaolin,Li Lu,Wang Xiao
Amorphous GeO 2 @C anode materials were successfully prepared from commercial GeO 2 and C 6 H 12 O 6 .H 2 O by a hydrothermal method combined with sintering under nitrogen atmosphere protection. The anode materials showed an ideal spherical shape of about 3 μm and their surface was uniformly covered with C. GeO 2 @C composite anodes exhibited better storage performance for Li-ion batteries. The discharge-specific capacities of GeO 2 @C-3 sample were 1143, 1049, 776, 551, and 308 mAh g -1 at current densities of 0.2, 0.5, 1, 2, and 5 A g -1 , and restored to 1136 mAh g -1 when the current density returned to 0.2 A g -1 . The reversible specific capacity was 756 mAhg -1 after 1000 cycles at a current density of 1 A g -1 . The GeO 2 @C anode was stable in the process of charge and discharge, and no obvious pulverization occurred. GeO 2 @C composites stabilized the electrochemical properties through carbon and amorphous structure to improve the overall electrical conductivity in Li + embedding/de-embedding processes.
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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.
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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.
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高影响因子
Energy Materials
·
2024
·Vol. 4
·期 3
·N
·
IF 11.8
Zihao Wang,Tao Chen,Zhicui Song,Jianxiong Xing,Aijun Zhou,Jingze Li
Integrating metallic lithium (Li) with a three-dimensional (3D) host is a popular strategy for long-life Li composite anodes, where the structure and physicochemical nature of the framework are critical for the electrochemical performance. Herein, Li-rich dual-phase barium (Ba)-based alloy composed of BaLi4 intermetallic compounds and Li metal phases is thermally incorporated into commercial carbon cloth sheets to develop Li-Ba alloy composite (LBAC) anodes featuring a porous array of BaLi4 microchannels as the built-in 3D skeleton. Doping of metallic Ba can greatly lower the surface tension of liquid Li and improve the wettability of the molten Li-Ba alloy toward the carbon cloth substrate. Moreover, LBAC benefits from the superior lithiophilicity and the porous architecture of BaLi4 skeleton nested in a conductive carbon fiber matrix, leading to stable cycling performance by confining Li stripping/plating in microchannels network of BaLi4 alloy framework and dissipating high current densities. As a result, the LBAC symmetrical cells can run stably for 1,000 h under 1 mA cm-2 and 1 mA h cm-2, and the capacity retention can retain 93.3% after 300 cycles in the full cell with areal capacity of 2.45 mA h cm-2. This work offers a smart designing strategy of 3D Li alloy composite anodes by introducing porous and lithiophilic alloy scaffold as sub-framework of the carbon hosting anode, promising the prospect of Li metal batteries for future applications.
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高影响因子
Scientific Reports
·
2016
·Vol. 6
·期 1
·1-8
·
IF 5.228
He Na,Zhong Lei,Xiao Min,Wang Shuanjin,Han Dongmei,Meng Yuezhong
Sulfur is a promising cathode material with a high theoretical capacity of 1672 mAh g −1 , however, the practical energy density of Li-S battery is far away from such promising due to its low active material utilization and low sulfur loading. Moreover, the challenges of the low electrical conductivity of sulfur and the high solubility of polysulfide intermediates still hinder its practical application. Here, we report a kind of free-standing and foldable cathodes consisting of 3D activated carbon fiber matrix and sulfur cathode. The 3D activated carbon fiber matrix (ACFC) has continuous conductive framework and sufficient internal space to provide a long-distance and continuous high-speed electron pathway. It also gives a very larger internal space and tortuous cathode region to ACFC accommodate a highly sulfur loading and keeps polysulfide within the cathode. The unique structured 3D foldable sulfur cathode using a foldable ACFC as matrix delivers a reversible capacity of about 979 mAh g −1 at 0.2C, a capacity retention of 98% after 100 cycles, and 0.02% capacity attenuation per cycle. Even at an areal capacity of 6 mAh cm −2 , which is 2 times higher than the values of Li-ion battery, it still maintains an excellent rate capability and cycling performance.
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Hanwei Zhang,Xuri Wang,Ahmad Naveed,Tianyi Zeng,Xiaoyun Zhang,Hancheng Shi,Mingru Su,Aichun Dou,Yu Zhou,Yunjian Liu
Nickel-rich cathode materials are widely used for electronic devices because of their high capacity and rate performance. However, structural deterioration after long-term cycling leads to a significant decline in capacity and cycle life. In this work, the effects of three different cations doping on the structural stability and electrochemical performance of Ni-rich cathode materials were investigated. XRD characterization reveals that doped cation leads to broadening of the distance between Li layers and inhibiting Li + /Ni 2+ mixing arrangement. Compared with Na + and K + , the high valence Mg 2+ provides a stronger Mg-O bond, which can effectively restrain the undesired phase transition and sustain the ordered structure. Electrochemical tests demonstrate that NCA with Mg doping has better cycle stability and rate performance than Na and K. The capacity retention rate of NCA with 1% Mg doping is 87.7% after 200 cycles at 1C, and it can still provide a specific capacity of 146.8 mAh g −1 at a high rate of 5C.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Jun Wei,Xinyu Ma,Fengrui Yang,Shuwei Jia,Zhi Wang
Efficient separation of Mg 2+ /Li + is the key to extracting lithium resources from salt lakes. In this work, a symmetrical bis-quaternary ammonium salt (quaternized 1, 4-dimethylpiperazine, QDMPIP) monomer was synthesized and grafted to the surface of a polyamide nanofiltration membrane. By modulating the grafting amount of QDMPIP monomers, the membrane properties—including positive charge density, pore size, and hydrophilicity—were tailored. The surface of optimally QDMPIP-grafted membrane has a strong positive property, which can reduce Mg 2+ /Li + from 50 (feed) to 0.85 (permeate), and the corresponding S Mg2+/Li + reaches 58.5, which is 7.4 times that of the unmodified membrane. Remarkably, the flux remained comparable to the pristine membrane, while achieving a MgCl 2 rejection rate exceeding 93 % at 6000 ppm. In addition, the grafting of QDMPIP also improves the crosslinking degree of the membrane surface, which makes it have stable performance at complex operating pressures. Owing to its exceptional separation efficiency, high stability, and straightforward fabrication process, the QDMPIP-modified membrane demonstrates great industrialization potential in the extraction of lithium resources from salt lakes with a high Mg 2+ /Li + ratio.
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Zhihao Shi,Bingjue Wang,Ziwei Zhang,Han Chen,Yujie Shi,Yulei Sui,Ling Wu
Transition metal carbides/nitrides (MXene) emerge as promising enhancers for high-capacity metal sulfide anodes, owing to exceptional electrical conductivity, mechanical robustness and adaptable surface chemistry. Here, MXene/SnS 2 heterostructures with a honeycomb architecture are fabricated by a mild liquid-phase deposition method. Density functional theory calculations reveal that the negatively charged MXene terminal groups govern the Sn 4+ cation adsorption, thereby promoting nucleation. By optimizing component dispersion and interfacial bonding, the composite effectively combines the high capacity of SnS 2 with the conductive MXene framework, achieving initial discharge capacities of 1547.0 and 555.3 mAh g −1 at the current densities of 0.1 and 5 A g −1 , respectively. After 1000 cycles, it retains a capacity retention of 69.5 % at 5 A g −1 . The hierarchically structured interface enhances ion transport and pseudocapacitive effects, enabling fast rate performance. The approach provides an idea for designing fast-charging anodes with high energy density.
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高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Cheng Zhu,Liu Hang,Zhang Menghang,Pan Hui,Sheng Chuanchao,Li Wei,Wagemaker Marnix,He Ping,Zhou Haoshen
Rechargeable Li||I 2 batteries based on liquid organic electrolytes suffer from pronounced polyiodides shuttling and safety concerns, which can be potentially tackled by the use of solid-state electrolytes. However, current all-solid-state Li||I 2 batteries only demonstrate limited capacity based on a two-electron I − /I 2 polyiodides chemistry at elevated temperatures, preventing them from rivaling state-of-the-art lithium-ion batteries. Herein, we report a fast, stable and high-capacity four-electron solid-conversion I − /I 2 /I + chemistry in all-solid-state Li||I 2 batteries at room temperature. Through the strategic use of a highly conductive, chlorine-rich solid electrolyte Li 4.2 InCl 7.2 as the catholyte, we effectively activate the I 2 /I + redox couple. This activation is achieved through a robust I-Cl interhalogen interaction between I 2 and the catholyte, facilitated by an interface-mediated heterogeneous oxidation mechanism. Moreover, apart from serving as Li-ion conduction pathway, the Li 4.2 InCl 7.2 catholyte is demonstrated to show a reversible redox behavior and contribute to the electrode capacity without compromising its conductivity. Based on the I − /I 2 /I + four-electron chemistry, the as-designed all-solid-state Li||I 2 batteries deliver a high specific capacity of 449 mAh g -1 at 44 mA g -1 based on I 2 mass and an impressive cycling stability over 600 cycles with a capacity retention of 91% at 440 mA g -1 and at 25 °C.
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Jianwen Xu,Menghan Zhu,Mingdao Zhang,Li Song,Yachao Jin
Lithium/Carbon Fluoride (Li/CF x ) primary batteries are widely regarded as one of the most promising electrochemical energy supply technologies in the military and medical fields due to their high energy density, low self-discharge rate, and good safety performance. However, Li/CF x batteries suffer from poor power density and severe voltage hysteresis, and solutions are often considered in terms of both cathode and electrolyte. In this work, an N,N-dimethylacetamide (DMA)-based electrolyte was designed to enhance the discharge platform of Li/CF x . The results show that DMA has a high dielectric constant and can effectively improve the ionic conductivity of the electrolyte as well as increase the solubility of lithium salts in the electrolyte. The optimized electrolyte was 1 M lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) dissolved in DMA and PC (7:3 vol ratio). At 1C discharge rate, the specific capacity reached 726 mAh/g, the specific energy reached 1634 Wh/kg, and the voltage platform was raised to 2.32 V. The optimized electrolyte also demonstrates better discharge performance in pouch batteries.
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高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Jiaqi Wu,Bin Liu,Jian Qian,Yuan Tao,Chenxiao Lin,Ruicheng Wang,Jie Gao,Yonggao Xia
The rapid growth of the electric vehicle industry is generating large quantities of spent lithium-ion batteries. However, these batteries have complex compositions, making current recycling processes inefficient at recovering valuable metals. Herein, lithium and aluminum from spent lithium-ion batteries were directly extracted and used to prepare aluminum-based lithium-ion adsorbents through a facile co-precipitation approach for the first time. This approach eliminates aluminum interference with nickel, cobalt, and manganese, simplifying the recovery of cathode materials. The developed aluminum-based lithium adsorbent displayed excellent ion selectivity and stability, with an adsorption capacity of 7.44 mg/g from a 500 mg/L lithium solution at 30℃, maintaining 96.18 % capacity after seven adsorption cycles. Additionally, this adsorption process follows pseudo-second-order kinetics and the Sips model. Cation competition experiments showed the ionic selectivity follow the sequence Li + > Mg 2+ > Na + > K + > Ca 2+ . This approach enables a one-step regeneration and utilization of lithium-aluminum resources from spent lithium-ion batteries, potentially lowering recycling costs and holds promise for large-scale applications.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Qiao Li,Jiahui Yu,Shaowu Huang,Xuehua Liu,Chunfu Lin
Titanium niobates with shear ReO 3 crystal structures have emerged as promising candidates for environmental-friendly lithium-ion batteries due to their excellent low-temperature electrochemical performance. However, the underlying mechanism of this merit at low temperatures remains unclear. In this work, through in-situ powder X-ray diffraction examination, we identify that TiNb 2 O 7 and Ti 2 Nb 10 O 29 own negative thermal expansion (NTE) behavior along the b axis (−6.29 × 10 −7 K −1 for TiNb 2 O 7 and −4.8 × 10 −6 K −1 for Ti 2 Nb 10 O 29 ) for the first time, which significantly benefits their low-temperature performance. This NTE behavior in TiNb 2 O 7 //Ti 2 Nb 10 O 29 enables wider Li + diffusion channels and larger embedding sites at low temperatures, leading to good −10 °C performance with a high reversible capacity (78 %//84 % of that at 25 °C), rapid Li + diffusion (63 %//32 % of that at 25 °C), and good rate capability (1C vs. 0.1C retention of 70 %//64 %). In addition, the more open low-temperature crystal structure in TiNb 2 O 7 //Ti 2 Nb 10 O 2 reduces unit-cell-volume expansion during lithiation at low temperatures, enhancing the −10 °C cycling stability (101.3 %//93.9 % capacity retention after 1000 cycles at 10C). Therefore, TiNb 2 O 7 and Ti 2 Nb 10 O 29 are very suitable for low-temperature energy storage.
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高影响因子
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