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2023年7月嘲风作品集（一）

已有 1060 次阅读 2023-9-28 10:43 |个人分类:作品发表|系统分类:论文交流

▲ Vol 04 Issue 07 | July , 2023

Unlocking the Polarization and Reversibility Limitations for Stable Low-Temperature Lithium Metal Anodes

Rui Xu, Shuo Zhang, Xin Shen, Nan Yao, Jun-Fan Ding, Ye Xiao, Lei Xu, Chong Yan, Jia-Qi Huang

Low Temperature Lithium Metal Batteries
In article 2200400, Jia-Qi Huang and co-workers deconvolved the overpotential contributions of Li electroplating in low-temperature operation conditions, in which a strong interplay among the dominating kinetic overpotential, the dynamic evolution of solid electrolyte interphase chemistry, and the corresponding Li reversibility is identified.

https://onlinelibrary.wiley.com/doi/10.1002/sstr.202370017

▲ Vol 02 Issue 03 | July , 2023

Microstructure and thermoelectric properties of nanoparticled copper selenide alloys synthesized using a microwave-assisted hydrothermal method

Mahwish Khan, Jinze Zhai, Wenbin Su, Fahad Mehmood, Tingting Chen, Juanjuan Feng, Hongchao Wang, Chunlei Wang

With the fabrication of high-performance thermoelectric (TE) materials, developments are being made in enhancing the figure of merit, zT, of TE materials. Liquid-like binary copper selenide (Cu2Se) chalcogenides recently gained significant recognition because of their anomalous but fascinating electrical and thermal transport performances. In this study, a facile synthesis technique was adopted in fabricating Cu2Se nanoparticles using a rapid microwave-assisted hydrothermal route at different reaction times. The results were compared with those of the Cu2Se solid-state (SS) sample synthesized using the traditional melting and annealing technique. X-ray diffraction patterns revealed successful synthesis of nanoparticles and a phase transition from orthorhombic α-phase and cubic β-phase to a single orthorhombic structure after hot-pressing. Scanning electron microscopic images revealed that although the grain sizes of the nanoparticle (NP) bulk samples increased with the reaction time of the microwave hydrothermal process, the grain sizes were significantly smaller than that of the SS sample. Additionally, NP bulk samples exhibited plenty of nano-grains and pores that are absent in the SS sample. The size and distribution of the grains and pores were measured to study their effects on the transport of carriers and phonons. The NP30 sample exhibited the highest power factor of 983.3 μW K−2 m at 673 K among the NP samples, exhibiting intermediate values of resistivity and Seebeck coefficient that are close to those of the SS sample. Moreover, the NP samples exhibited appreciably lower thermal conductivity than the SS sample that is attributed to strengthened phonon scattering. The minimum thermal conductivity of the NP05 sample, 0.78 WK−1 m−1 at 348 K, is 1.7 times lower than that of the SS sample. Finally, a maximum zT of 0.56 at 673 K, being approximately 1.3 times higher than that of the SS sample owing to the optimized thermal conductivity, was achieved for the NP30 sample. This value is comparable to or higher than that reported for Cu2Se synthesized using the traditional SS method. Investigations revealed that the proposed microwave hydrothermal synthesis technique is a facile, rapid, and reliable method that results in Cu2Se alloys with excellent TE performance.

https://www.sciencedirect.com/science/article/pii/S2772571522000456

▲ Vol 07 Issue 07 | July , 2023

Stabilization of photoactive phases for perovskite photovoltaics

Xueping Liu, Deying Luo, Zheng-Hong Lu, Jae Sung Yun, Michael Saliba, Sang Il Seok & Wei Zhang

Interest in photovoltaics (PVs) based on Earth-abundant halide perovskites has increased markedly in recent years owing to the remarkable properties of these materials and their suitability for energy-efficient and scalable solution processing. Formamidinium lead triiodide (FAPbI3)-rich perovskite absorbers have emerged as the frontrunners for commercialization, but commercial success is reliant on the stability meeting the highest industrial standards and the photoactive FAPbI3 phase suffers from instabilities that lead to degradation — an effect that is accelerated under working conditions. Here, we critically assess the current understanding of these phase instabilities and summarize the approaches for stabilizing the desired phases, covering aspects from fundamental research to device engineering. We subsequently analyse the remaining challenges for state-of-the-art perovskite PVs and demonstrate the opportunities to enhance phase stability with ongoing materials discovery and in operando analysis. Finally, we propose future directions towards upscaling perovskite modules, multijunction PVs and other potential applications.

https://www.nature.com/articles/s41570-023-00492-z

▲ Vol 13 Issue 25 | 07 July , 2023

Lithium-Ion Batteries Participating in Frequency Regulation through Low-Destructive Bidirectional Pulsed Current Operation

Xiao-Ru Chen, Yu-Di Qin, Xin Shen, Chong Yan, Rui Diao, Heng-Zhi Zhu, Cheng Tang, Minggao Ouyang, Qiang Zhang

Vehicle-to-Grid
In article number 2300500, Minggao Ouyang, Qiang Zhang, and co-workers describe non-destructive lithium ion batteries participating in frequency regulation service through application of a bidirectional pulsed current with the appropriate parameters. Not only are the batteries not impaired, but the lithium-ion batteries scattered in the end devices are aggregated to provide services for the future electricity grid with high-penetration of renewable energy sources.

‍https://onlinelibrary.wiley.com/doi/10.1002/aenm.202370107‍

▲ Vol 145 Issue 27 | 12 July , 2023

Dynamic Metal–Ligand Coordination Boosts CO2 Electroreduction

Xiangdong Kong, Jiankang Zhao, Zifan Xu, Zhengya Wang, Yingying Wu, Yaohui Shi, Hongliang Li, Chuanxu Ma, Jie Zeng, and Zhigang Geng

The interfacial structure of heterogeneous catalysts determines the reaction rate by adjusting the adsorption behavior of reaction intermediates. Unfortunately, the catalytic performance of conventionally static active sites has always been limited by the adsorbate linear scaling relationship. Herein, we develop a triazole-modified Ag crystal (Ag crystal–triazole) with dynamic and reversible interfacial structures to break such a relationship for boosting the catalytic activity of CO2 electroreduction into CO. On the basis of surface science measurements and theoretical calculations, we demonstrated the dynamic transformation between adsorbed triazole and adsorbed triazolyl on the Ag(111) facet induced by metal–ligand conjugation. During CO2 electroreduction, Ag crystal–triazole with the dynamically reversible transformation of ligands exhibited a faradic efficiency for CO of 98% with a partial current density for CO as high as −802.5 mA cm–2. The dynamic metal–ligand coordination not only reduced the activation barriers of CO2 protonation but also switched the rate-determining step from CO2 protonation to the breakage of C–OH in the adsorbed COOH intermediate. This work provided an atomic-level insight into the interfacial engineering of the heterogeneous catalysts toward highly efficient CO2 electroreduction.

‍https://pubs.acs.org/doi/10.1021/jacs.3c04143‍

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