JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
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2024
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IF 2.3
Gao Shuai,Han Meixu,Pan Jinwen,Zhong Yang,Jiang Hongyi
Silica aerogel (SA) was synthesized through the sol-gel process followed by ambient pressure drying, with aluminum-deposited silica aerogel (ASA) subsequently produced via aluminum deposition using an AlCl 3 ·6H 2 O hydrolysis solution. This study examined the impact of deposition time and calcination temperature on ASA’s characteristics. Compared to the non-aluminum-deposited SA, ASA with 12 h of deposition time (ASA-12h) showcased a significant increase in specific surface area, reaching 675m 2 ∙ g −1 at room temperature. Post-calcination at 800 °C and 1000 °C resulted in specific surface areas of 613m 2 ∙ g −1 and 265m 2 ∙ g −1 , respectively, markedly surpassing those of SA (240 m 2 ∙g −1 at 800 °C and 16m 2 ∙ g −1 at 1000 °C). The results demonstrate that during the aging process, the deposited aluminum is coated by the aging solution, enabling it to remain stable and distribute uniformly. This deposition not only increases the particle size but also enhances structural stability. Furthermore, the formation of new Si-O-Al bonds improves the thermal stability of the silicon dioxide lattices. These insights pave the way for the industrial production of aerogels that are resistant to high temperatures. Graphical Abstract
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2020
·Vol. 14
·期 3
·646-653
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IF 8.183
Jiao Handong,Jiao Shuqiang,Song Wei-Li,Xiao Xiang,She Dongmei,Li Na,Chen Haosen,Tu Jiguo,Wang Mingyong,Fang Daining
Rechargeable Al-ion batteries (AIBs) are considered as one of the most fascinating energy storage systems due to abundant Al resource and low cost. However, the cycling stability is subjected to critical problems for using Al foil as negative electrode, including Al dendrites, corrosion and pulverization. For addressing these problems, here a lightweight self-supporting N-doped carbon rod array (NCRA) is demonstrated for a long-life negative electrode in AIBs. Experimental analysis and first-principle calculations reveal the storage mechanism involving the induced deposition of N-containing function groups to Al as well as the ideal skeleton of the NCRA matrix for Al plating/stripping, which is favorable for regulating Al nucleation and suppressing dendrites growth. Compared with the Al foil, the NCRA exhibits lower areal mass density (∼ 72% of Al foil), smaller thickness (40% of Al foil), but much longer cycle life (> 4 times of Al foil). Benefiting from the remarkable stability of the array structure, symmetric cells show excellent cycling stability with small voltage hysteresis (∼ 80 mV) and meanwhile there are no corrosion and pulverization problems even after cycled for 120 hours. Besides, full cells also manifest long lifespan (1,500 cycles) and increased Coulombic efficiency (100±1%).
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·Vol. 20
·期 17
·2308632
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IF 13.3
Shunlong Ju,Qing Qiao,Tian Xu,Zhongchen Zhao,Tengfei Zhang,Guanglin Xia,Xuebin Yu
Constructing robust anode with strong aluminophilicity and rapid desolvation kinetics is essential for achieving high utilization, long-term durability, and superior rate performance in Al metal-based energy storage, yet remains largely unexplored. Herein, molybdenum nanoparticles embedded onto nitrogen-doped graphene (Mo@NG) are designed and prepared as Al host to regulate the deposition behavior and achieve homogeneous Al plating/stripping. The monodispersed Mo nanoparticles reduce the desolvation energy barrier and promote the deposition kinetics of Al. Additionally, Mo nanoparticles act as aluminophilic nucleation sites to minimize the Al nucleation overpotential, further guiding uniform and dense Al deposition. As a result, the dual-functional Mo@NG endows Al anodes with low voltage hysteresis, reversible Al plating/stripping with high coulombic efficiency, and excellent high-rate capability under 5 mA cm −2 . Moreover, the as-designed Al metal full batteries deliver a high capacity retention of 92.8% after 3000 cycles at 1 A g −1 . This work provides an effective solution to optimize the electrochemical properties of Al metal anode from the perspective of desolvation and deposition reactions, towards the development of high-safety and long-cycling aluminum-ion batteries.
研究领域:
材料科学
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电化学
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能源存储
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纳米技术
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金属负极
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电池化学
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界面工程
✓ 已验证
DOI
高影响因子
Nature Sustainability
·
2025
·
IF 27.1
Zhang Bo,Li Zhiguo,Han Daliang,Min Zhiwen,Cui Changjun,Wang Li,Li Qiang,Mao Xuejiao,Sun Yuanmiao,Weng Zhe,Yang Quan-Hong
The transition to clean energy necessitates the development of alternative or complementary battery chemistries to lithium-ion batteries. Aluminium (Al) metal batteries (AMBs) are a promising option owing to their high energy density and advantages in terms of abundance, recyclability, manufacturability and sustainability. However, state-of-the-art AMBs rely primarily on electrolytes featuring chloroaluminate anions such as Al 2 Cl 7 − . Unfortunately, such electrolytes create a disparity between achievable energy density and potential, in addition to having high corrosivity, high cost, high viscosity and poor transport kinetics. Here we break this paradigm by formulating an organochloro electrolyte with AlCl 3 salt in dipropyl ether (DPE) solvent. Notably, this AlCl 3 /DPE electrolyte shows no corrosion behaviour towards stainless steel current collectors during 90-day soaking. It enables stable cycling of the Al anode for over 2,000 h at 0.2 mA cm −2 and a high Coulombic efficiency of 99.85%, and prototype Al//Mo 6 S 8 full cells survive 300 cycles. Underlying these unprecedented performances is the unique organochloro solvation structure, AlCl 2 (DPE) 2 + , which is desolvatable and immobilizes free Cl − . By extending the horizon of electrolyte design into the organic domain, this work addresses the notorious issues facing AMBs and paves the way for the implementation of multivalent rechargeable batteries.
研究领域:
储能
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电化学
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电池技术
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材料科学
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可持续能源
✓ 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）