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| 1 | Molecular crowding agents engineered to make bioinspired electrolytes for high-voltage aqueous supercapacitors显示文摘The development of low-cost and eco-friendly aqueous electrolytes with a wide voltage window is the key to achieving safe high energy density supercapacitors(SCs).In this work,a molecular crowding electrolyte is prepared by simulating the crowded environment in living cells.Ion transport in the molecular crowding electrolyte can be effectively improved via reducing the molecular weight of the crowding agent,polyethylene glycol(PEG).The results show that PEG with a molecular weight of 200(PEG200)can significantly improve ionic conductivity while maintaining a wide voltage window.These advantages enable commercial activated carbon-based SCs to work at 2.5 V with high energy density,outstanding rate performance and good stability for more than 10,000 cycles.On this basis,three series of molecular crowding electrolytes using sodium perchlorate,lithium perchlorate,and sodium trifluoromethanesulfonate as salts are developed,demonstrating the versatility of PEG200 for wide-voltage aqueous electrolytes. | Mengke Peng Li Wang Longbin Li Zhongyou Peng Xiannong Tang Ting Hu Kai Yuan Yiwang Chen | 2021 | eScience2021，1，1： | 5 |
| 2 | Hydrothermal growth of hydroxyapatite and ZnO bilayered nanoarrays on magnesium alloy surface with antibacterial activities显示文摘Magnesium alloy(MgA)has been extensively used as orthopedic and cardiovascular scaffolds in virtue of its good biocompatibility,unique biodegradability and excellent mechanical properties.However,poor corrosion resistance and easy infection after implantation seriously limit the potential applications of MgA in the biomedical field.Herein,we fabricated bilayered nanoarrays of hydroxyapatite nanorods(HANRs)and ZnO nanorods(ZnONRs)onto the surface of MgA(MgA-MgO-HANRs-ZnONRs)via micro-arc oxidation(MAO)treatment,microwave-assisted hydrothermal and hydrothermal methods.The morphology and chemical composition of MgA-MgO-HANRs-ZnONRs was characterized by FE-SEM,XRD and EDS,indicating that HANRs-ZnONRs bilayered nanoarrays were fabricated on the surface of MgA-MgO.The surface of MgA-MgO-HANRs-ZnONRs exhibited excellent hydrophilicity as evidenced by the low water contact angle of 3°.Compared with the original MgA,the corrosion resistance of MgA-MgO-HANRs-ZnONRs was obviously improved with decreasing the corrosive current density(icorr)of 2 orders of magnitude.The MgA-MgO-HANRs-ZnONRs performed excellent antibacterial properties with the bactericidal rate of 96.5%against S.aureus and 94.3%against E.coli. | Mengke Peng Fenyan Hu Minting Du Bingjie Mai Shurong Zheng Peng Liu Changhao Wang Yashao Chen | 2020 | Frontiers of Materials Science2020，14，1： | 3 |
| 3 | Towards magnetism in pigeon MagR: Iron- and iron-sulfur binding work indispensably and synergistically显示文摘The ability to navigate long distances is essential for many animals to locate shelter,food,and breeding grounds.Magnetic sense has evolved in various migratory and homing species to orient them based on the geomagnetic field.A highly conserved ironsulfur cluster assembly protein IscA is proposed as an animal magnetoreceptor(MagR).Iron-sulfur cluster binding is also suggested to play an essential role in MagR magnetism and is thus critical in animal magnetoreception.In the current study,we provide evidence for distinct iron binding and iron-sulfur cluster binding in MagR in pigeons,an avian species that relies on the geomagnetic field for navigation and homing.Pigeon MagR showed significantly higher total iron content from both iron-and ironsulfur binding.Y65 in pigeon MagR was shown to directly mediate mononuclear iron binding,and its mutation abolished iron-binding capacity of the protein.Surprisingly,both iron binding and iron-sulfur binding demonstrated synergistic effects,and thus appear to be integral and indispensable to pigeon MagR magnetism.These results not only extend our current understanding of the origin and complexity of MagR magnetism,but also imply a possible molecular explanation for the huge diversity in animal magnetoreception. | Yajie Zhou Tianyang Tong Mengke Wei Peng Zhang Fan Fei Xiujuan Zhou Zhen Guo Jing Zhang Huangtao Xu Lei Zhang Shun Wang Junfeng Wang Tiantian Cai Xin Zhang Can Xie | 2023 | Zoological Research2023，44，1： | 1 |
| 4 | Kinetics and thermal stability of the Ni_(62)Nb_(38–x)Ta_x(x=5, 10, 15,20 and 25) bulk metallic glasses显示文摘We studied thermal stability and its relationship to the glass-forming ability(GFA) of the Ni_(62)Nb_(38–x)Ta_x(x=5, 10, 15, 20, 25) bulk metallic glasses(BMG) from a kinetic point of view. By fitting the heating-rate dependence of glass transition temperature(Tg onset)and crystallization temperatures(T_x^(onset) and T_x^(peak)) of the Ni_(62)Nb_(38–x)Ta_x BMG using the Vogel-Fulcher-Tammann(VFT) equation, we obtained the ideal glass transition and crystallization temperatures(T_g^0 and T_x^0) and the fragility parameter(m), and also constructed continuous heating transition(CHT) diagrams for crystallization of the BMG. The CHT diagrams of the BMG indicate enhanced thermal stability by Ta addition; the T_g^0 as well as the T_x^0 also illustrates this improved stability limit. The compositional dependence of m, which agrees well with that of the reduced glass-transition temperature, indicates a strong correlation between liquid fragility and glass-forming ability in the present alloy system. These results provide new evidence for understanding thermal stability,liquid fragility, and GFA in BMG. | MengKe He Yi Zhang Lei Xia Peng Yu | 2017 | Science China(Physics,Mechanics & Astronomy)2017，60，7： | 1 |
| 5 | Unexpected divergence in magnetoreceptor MagR from robin and pigeon linked to two sequence variations显示文摘Birds exhibit extraordinary mobility and remarkable navigational skills,obtaining guidance cues from the Earth’s magnetic field for orientation and long-distance movement.Bird species also show tremendous diversity in navigation strategies,with considerable differences even within the same taxa and among individuals from the same population.The highly conserved iron and iron-sulfur cluster binding magnetoreceptor(MagR)protein is suggested to enable animals,including birds,to detect the geomagnetic field and navigate accordingly.Notably,MagR is also implicated in other functions,such as electron transfer and biogenesis of iron-sulfur clusters,raising the question of whether variability exists in its biochemical and biophysical features among species,particularly birds.In the current study,we conducted a comparative analysis of MagR from two different bird species,including the migratory European robin(Erithacus rubecula)and the homing pigeon(Columba livia).Sequence alignment revealed an extremely high degree of similarity between the MagRs of these species,with only three sequence variations.Nevertheless,two of these variations underpinned significant differences in metal binding capacity,oligomeric state,and magnetic properties.These findings offer compelling evidence for the marked differences in MagR between the two avian species,potentially explaining how a highly conserved protein can mediate such diverse functions. | Shun Wang Peng Zhang Fan Fei Tianyang Tong Xiujuan Zhou Yajie Zhou Jing Zhang Mengke Wei Yanqi Zhang Lei Zhang Yulong Huang Lin Zhang Xin Zhang Tiantian Cai Can Xie | 2024 | Zoological Research2024，45，1： | 0 |
| 6 | Carbon nanotube-based photothermal membrane for efficient cold air heating and removal of particulate matter and airborne bacteria显示文摘Indoor heating results in high energy consumption and severe atmospheric pollution.Although the development of solar air heaters provides a sustainable route for indoor thermal comfort,such heaters still face challenges in terms of adequate heat exchange and filtering of atmospheric pollutants.Inspired by solar-driven interfacial evaporation,we propose a multifunctional carbon nanotube-based photothermal membrane for efficient cold air heating and purification via ventilation.Carbon nanotubes endow the membrane with high light absorption and thermal conversion capabilities,thereby sufficiently heating the approaching cold air.With the hierarchical structure formed by phase inversion,the thin upper skin of the composite membrane intercepts micropollutants via the size-sieving effect,whereas the finger-like pores and interpenetrating macrovoids inside the membrane ensure that the heated clear air passes through quickly.A proof-of-principle experiment indicated a cold airflow of 1 L/min across the membrane,yielding a temperature increase of ca.37°C as well as a PM 2.5 rejection always higher than 93%.Further antibacterial experiments demonstrated that the membrane effectively removed airborne bacteria.This multifunctional carbon nanotube-based photothermal membrane with specific microstructures not only improves the indoor living quality but also provides a sustainable development scheme to coordinate the relationship among energy utilization,building heating,and air purification. | Weichao Dong Lina Huang Xiangju Song Yan Zhang Mengke Liu Zhenzhen Ren Long Pang Hui Peng Heqing Jiang | 2024 | Green Carbon2024，2，1： | 0 |
| 7 | Deciphering the degradation discrepancy in Ni-rich cathodes with a diverse proportion of[003]crystallographic textures显示文摘The crystal plane plays a very important role in the properties of Ni-rich cathodes.[003]crystallographic texture regulation has been proven to improve structural stability,and yet,the discrepancy of particles with different exposed ratios of[003]in structural attenuation has not been clarified.Herein,we have unraveled comprehensively the structural decay difference for Ni-rich cathodes’primary particles with the different percentages of exposed[003]by regulating the precursor coprecipitation process.The findings based on structural characterization,first-principles calculations,finite element analysis,and electrochemical test reveal that the length and width of particles represent[110]and[003]directions,respectively,and show that cathode particles with a higher[110]/[003]ratio can effectively inhibit structure degradation and intergranular/intragranular crack formation owing to the low oxygen vacancy formation energy on(003)planes and the small local stress on secondary/primary particles.This study may provide guidance for the structural design of layered cathodes. | Lang Qiu Mengke Zhang Yang Song Zhenguo Wu Yan-Fang Zhu Jun Zhang Dong Wang Hai-Yan Hu Hong-Wei Li Hang-Rui Liu Xin-Bei Jia Jian Peng Shuangqiang Chen Zuguang Yang Yao Xiao Xiaodong Guo | 2023 | Carbon Energy2023，5，7： | 0 |
| 8 | Enriching redox active sites by interconnected nanowalls-like nickel cobalt phospho-sulfide nanosheets for high performance supercapacitors显示文摘Although transition metal phospho-sulfides deliver outstanding electrochemical performance,complex preparation methods hindered their further development.Herein,we report a facile one-step electrodeposition approach to deposit interconnected nanowalls-like nickel cobalt phospho-sulfide(Ni-Co-P-S)nanosheets onto the surface of carbon cloth.The thin Ni-Co-P-S nanosheets with multi-components and synergetic effects delivered rich active sites,further enhancing reversible capacitance.Therefore,the as-prepared Ni-Co-P-S electrode materials exhibit excellent electrochemical performance in a three-electrode system,showcasing a high specific capacitance of 2744 F/g at 4 A/g.The full supercapacitors based on Ni-Co-P-S as positive electrode and active carbon as negative electrode showcase a high specific capacitance of 110.9 F/g at 1 A/g,impressive energy density of 39.4 Wh/kg at a power density of 797.5 W/kg in terms of excellent cycling stability(91.87%retention after 10,000 cycles).This simple electrode position strategy for synthesizing Ni-Co-P-S can be extended to prepare electrode materials for various sustainable electrochemical energy storage/conversion technologies. | Kaiyang Zhang Yazhou Xu Yingchun Lin Yushuai Xiong Jun Huang Li Wang Mengke Peng Ting Hu Kai Yuan Yiwang Chen | 2021 | Chinese Chemical Letters2021，32，11： | 0 |
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