DIAMOND AND RELATED MATERIALS
·
2024
·
IF 4.3
Zixiang Hao,Yang Chen,Linrui Wang,Yuxuan Lu,Chengli He,Mingyan Wang,Xiaoli Cui
Elemental engineering has been employed to adjust molecular framework and electronic configuration of γ-graphyne for rapid lithium storage. Here, we construct a quasi-pyridinic nitrogen/sulfur co-doped γ-graphyne (N/S-GY) via a mechanochemical strategy and reveal its lithium storage behavior by quantitative kinetics analysis and theoretical calculations. The internal pyridinic-N atoms create rhombic channels for Li + passing through, while sulfur dopants anchored with alkynyl groups induce electron cloud rearrangement to facilitate intralayer Li + diffuse between C 12 -triangular channels and interlayer transfer through open rhombic channels. As a result, the as-prepared N/S-GY exhibits a high reversible capacity of 1003 mAh g −1 at 50 mA g −1 after 150 cycles, with Li + diffusion coefficient up to 2.6 × 10 −12 cm 2 s −1 , both of which are larger than that of N-doped γ-graphyne. This work highlights synergistic effect of sulfur and nitrogen co-doping in alkynyl carbon and inspires bottom-up heteroatom modification in framework design.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Jinyong Ren,Yaxuan Wang,Junxiu Piao,Jiahui Cui,Haocun Guan,Chuanmei Jiao,Xilei Chen
As the contradiction intensifies both the increasing consumption of petroleum resources and environmental protection, the exploitation and utilization of biological resources have reached an unprecedented height. In this work, a phosphorus-free and green organic-inorganic hybrid flame-retardant system was facilely constructed based on oyster waste via mechanochemical strategies for flame-retardant epoxy (EP). The characterization results showed the successful exfoliation of the lamellar structure in oyster waste during the mill process. EP composites with TOSP exhibited a short combustion time during the vertical combustion test. And the limited oxygen index value of EP composites with TOSP increased from 24.4 % to 27.3 %. Remarkably, the introduction of environmentally friendly TOSP enhanced the fire safety of EP (e.g., ∼41.8 % and 55.0 % decline in peak heat release rate (pHRR) and total CO production (TCOP) at only 4 wt% content). Hence, the work offers novel insights into the facile construction of a phosphorus-free and green organic-inorganic hybrid flame-retardant system and recycling oyster waste.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
WASTE MANAGEMENT
·
2024
·
IF 7.1
Xueru Wang,Haichao Yu,Jie Zhou,Hui Wang
Vast quantities of anode graphite from waste lithium ion batteries (LIBs), as a type of underrated urban mine, has enormous potential to be exploited for resource recovery. Herein, we propose a benign process integrating low-temperature pyrolysis and mechanochemical techniques to upcycle spent graphite (SG) from end-of-life LIBs . Pyrolysis at 500 °C leads to about 82.2 % PVDF dissociation in thermal treated graphite (TG). Solid-phase exfoliation via ball milling assisted by urea successfully produces abundant graphite flakes and a small amount of monolayer graphene nanosheet at the edge of mechanochemically processed graphite (MG). Subsequent rinsing removes the residual LiF salts. High purity and unique edge structural features of the as-prepared MG offer more active sites and storage reservoir for intercalation and de-intercalation of lithium ions, resulting in enhanced lithium-ion diffusion kinetics, excellent reversible specific capacity and desirable rate capability. Inspiringly, MG exhibits a remarkably enhanced initial specific charge capacity of 521.3 mAh g −1 during the first charge–discharge, and only declines from 569.9 mAh g −1 to 538 mAh g −1 with slight attenuation after 50 consecutive cycles at 0.1 A/g, indicating satisfactory cycle stability. Additionally, the purification and reconstruction mechanism for MG have been illustrated in detail. This study offers a green strategy to reconstruct and upgrade anode graphite from LIBs, which can realize sustainable waste management.
研究领域:
材料科学
·
环境科学
·
能源工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
You-Zhou Yang,Yun Rong,Yuan-Yuan Li,Mengmeng Ma,Dan Chen,Hang Lu,Chang Wu,Boyuan Shen,Jin-Ping Guan,Ming-Peng Zhuo
Smart materials demonstrate fascinating responses to environmental physical/chemical stimuli, including thermal, photonic, electronic, humidity, or magnetic stimuli, which have attracted intensive interest in material chemistry. However, their limited/harsh stimuli-responsive behavior or sophisticated postprocessing leads to enormous challenges for practical applications. Herein, we rationally designed and synthesized thermochromic Ni(II) organometallic [(C2H5)2NH2]2NiCl4–xBrx via a facile mechanochemical strategy, which demonstrated a reversible switch from yellow to blue color with a tunable phase-transition temperature from 75.6 to 61.7 °C. The simple electrospinning technology was applied to fabricate thermochromic Ni(II) organometallic-based nanofiber membranes for temperature monitoring. Furthermore, the organic charge-transfer cocrystal with a wide spectral absorption of 300–1950 nm and a high-efficiency photothermal conversion was combined with thermochromic Ni(II) organometallics for the desired dual-stimuli photo/thermochromism. This work supplies a new strategy for realizing multiple stimuli-responsive applications, such as thermal/light sensor displays and information storage.
研究领域:
材料化学
·
智能材料
·
热致变色材料
·
光致变色材料
·
纳米技术
·
传感器
✓ 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）