ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Baojia Qin,Yusen Wu,Ruijun Qiu,Jujun Ruan
For sustainable development of resources, pyrometallurgy, hydrometallurgy, and bioleaching have been widely employed in the recovery of waste lithium-ion batteries. Metallic resources have been successfully recovered by these technologies. However, high-value and comprehensive utilization technology of waste lithium-ion batteries is still in its infancy. In this paper, a combined technology of material molecular design and vacuum gasification deposition to prepare high-value optical materials (La-doped LiAl5O8) from the electrode materials of waste lithium-ion batteries is reported. The band gap of the designed La-doped LiAl5O8 was reduced by 1.077 eV compared to that of LiAl5O8. The La-d state caused a blue shift in the spectrogram so that the material can be excited by lower energy light. La-doped LiAl5O8 was successfully prepared by vacuum gasification deposition, and its strongest emission peak was at 450 nm. Photoluminescence intensity of La-doped LiAl5O8 was twice that of LiAl5O8. Chromaticity of the recovered La-doped LiAl5O8 was located at (0.17, 0.15), which indicated that La-doped LiAl5O8 was a highly efficient blue-emissive material and had great potential application in light-emitting diodes. This paper contributes to a new strategy in the value-added recovery of solid waste.
研究领域:
材料科学
·
资源回收
·
环境工程
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产品关联
DOI
高影响因子
Materials Today Physics
·
2021
·
IF 9.298
Y. Wu,D. Lei,C. Wang
Lithium metal has been regarded as an ideal anode to meet the rapidly growing requirements on high energy density batteries , owing to their highest gravimetric capacity and their lowest redox potential . However, lithium metal batteries persistently suffer from serious issues, such as the unstable solid electrolyte layer and uncontrolled dendrite growth during plating/stripping, especially under high current density . Herein, we developed an innovative method to prepare dense LiAl 5 O 8 nanowires membrane and designed a LiAl 5 O 8 nanowires membrane/poly (vinylidene fluoride-co-hexafluoropropylene)-based gel polymer composite electrolyte (LPH-GPE) to address these issues. On the interface of LPH-GPE and lithium anode, uniformly dispersed aluminum is in situ generated by reducing LiAl 5 O 8 nanowires, which brings both superlithiophilic sites and uniform lithium ion flux, and thus enables the lithium ion depositing in plates rather than forming sharp lithium dendrites . The solid-state lithium/lithium symmetric cells with LPH-GPE exhibit significantly improved lifespan at 0.5 mA cm − 2 and short-circuit does not occur even at current density up to 4 mA cm − 2 .
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 49
·期 7
·10273-10279
·
IF 5.532
Daiyuan Liu,Ting Wang,Yichun Liu,Chao Wang,Zhichao Liu,Xiaodie Zhu,Ya Liu,Jian Zhang,Zhaowei Teng,Yang Zhong,Yakovlev Alexey Nikolaevich,Xuhui Xu
The photoluminescence behavior of inorganic phosphors is generally influenced by thermal stability, which determines the luminescence efficiency of the corresponding devices. Here, a series of Eu 2+ , Mn 2+ co-doped LiAl 5 O 8 blue-green-emitting phosphors with thermal robust are successfully fabricated. The concentration-dependent emission spectra and the decay curves of the as-obtained LiAl 5 O 8 : Eu 2+ , Mn 2+ samples manifest the occurrence of the energy transfer from Eu 2+ to Mn 2+ ions via dipole-dipole interaction, and the corresponding emitted colors are gradually modulated from blue to green under the excitation of 310 nm. Moreover, the zero-thermal-quenching luminescence is observed when the operation temperature is up to 423 K, which is attributed to the energy release from the trapping centers to emitting centers (Eu 2+ and Mn 2+ ) at high temperature. Furthermore, a warm white light-emitting diodes (WLEDs) device with correlated color temperature of 5061 K, a color rendering index of 80.6 and long-term stability is fabricated by combining UV LED chip (λ ex = 310 nm), as-obtained LiAl 5 O 8 : Eu 2+ , Mn 2+ phosphor, commercially available red phosphor and green phosphor. These results prove the potential application of the as-obtained LiAl 5 O 8 : Eu 2+ , Mn 2+ phosphor for UV-pumped WLEDs devices.
研究领域:
材料科学
·
发光材料
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固态化学
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光电子学
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无机化学
·
器件物理
·
纳米材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Wenbo Ji,Fengmei Zhu,Yuan Gao,Jianbei Qiu
The performance and service life of a traditional NIR phosphor-converted light-emitting diodes sealed by epoxy resin are affected over time due to the low thermal conductivity of the casting material that leads to excessive heat build-up, an accelerated aging and discoloration of the resin. Here, we report the synthesis and characterization of a highly efficient NIR emitting LiAl 5 O 8 :Cr 3+ nanocrystals embedded in transparent glass-ceramic. Under 415 nm light excitation the emission, the new NIR phosphor exhibits NIR emission in sharp lines covering 650∼1000 nm to originate from the spin-allowed 4 T 2 / 2 E→ 4 A 2 transition of Cr 3+ ions, with an emission peak at ∼ 720 nm and an optimal PLQY of about ∼ 41.28%. The NIR emission originates from the spin-allowed 4 T 2 / 2 E→ 4 A 2 transition of Cr 3+ . The transparent glass-ceramic showed excellent luminescence thermal stability; the integrated luminescence intensity measured at 383 K is ∼ 66.55% of that measured at room temperature (303 K). We constructed a NIR pc-LED light source device by coupling a piece of LiAl 5 O 8 :Cr 3+ nanocrystal-laden glass-ceramic and a purple LED chip and performed characterization of the luminescence properties of this device. The potential application of this device in NIR imaging was demonstrated. Our study provides a basis for further development of thermal stable and highly efficient transparent glass-ceramic based NIR luminescence materials and the exploration for their applications.
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DOI
高影响因子
Small
·
2022
·Vol. 18
·期 50
·2204875
·
IF 15.153
Zhenbang Li,Fei Tian,Yan Li,Danni Lei,Chengxin Wang
The insertion type materials are the most important anode materials for lithium-ion batteries, but their insufficient capacity is the bottleneck of practical application. Here, LiAl 5 O 8 nanowires with high theoretical capacity and Li-ions diffusion coefficient are prepared and studied as an insertion anode material, which exhibits zero-strain properties upon electrochemical cycling. However, the poor electronic conductivity of LiAl 5 O 8 definitely sacrifices the capacity and limits the rate performance. Therefore, compact LiAl 5 O 8 and carbon composite are further synthesized, in which nanosized LiAl 5 O 8 particles are uniformly embedded in an amorphous carbon matrix. It displays a reversible capacity of 490.9 mAh g −1 at 1 A g −1 , and the capacity rises continuously to 996.8 mAh g −1 after 1000 cycles due to the interfacial storage mechanism, that the excess Li + ions can be accommodated in the grain boundaries and C/LiAl 5 O 8 interfaces.
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 Applied Materials & Interfaces
·
2024
·
IF 8.3
Zhenbang Li,Dongpeng Yu,Junjie Xie,Fei Tian,Danni Lei,Chengxin Wang
At present, graphite is a widely used anode material in commercial lithium-ion batteries for its low cost, but the large volume expansion (about 10%) after fully lithiated makes the material prone to cracking and even surface stripping in the cycle. Therefore, the development of zero-strain anode materials (volume change <1%) is of great significance. LiAl5O8 is a zero-strain insertion anode material with a high theoretical specific capacity. However, the Li+ storage mechanism remains unclear, and the cycle life as well as fast-charging capability need to be greatly improved to meet the practical requirements. In this study, LiAl5O8 nanorods are prepared by utilizing aluminum ethoxide nanowires as a soft template and doped with the Zr element to further improve the Li+ diffusion coefficient and electronic conductivity, which in turn improves cycle and rate performances. The Zr-doped LiAl5O8 presents a high reversible capacity of 227.2 mAh g–1 after 20,000 cycles under 5 A g–1, which significantly outperforms the state-of-the-art anode materials. In addition, the Li+ storage mechanisms of LiAl5O8 and Zr-doped LiAl5O8 are clearly clarified with a variety of characterization techniques including nuclear magnetic resonance. This work greatly promotes the practical process of zero-strain insertion anode materials.
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
危险品化学品经营许可证（带存储）