Hao Baojiu,Zhou Jinqiu,Yang Hao,Zhu Changhao,Wang Zhenkang,Liu Jie,Yan Chenglin,Qian Tao
The breakthrough in electrolyte technology stands as a pivotal factor driving the battery revolution forward. The colloidal electrolytes, as one of the emerging electrolytes, will arise gushing research interest due to their complex colloidal behaviors and mechanistic actions at different conditions (aqueous/nonaqueous solvents, salt concentrations etc.). Herein, we show “beyond aqueous” colloidal electrolytes with ultralow salt concentration and inherent low freezing points to investigate its underlying mechanistic principles to stabilize cryogenic Zn metal batteries. Impressively, the “seemingly undesired” concentration polarization at the interface would disrupt the coalescence stability of the electrolyte, leading to a mechanically rigid interphase of colloidal particle-rich layer, positively inhibiting side reactions on either side of the electrodes. Importantly, the multi-layered pouch cells with cathode loading of 10 mg cm –2 exhibit undecayed capacity at various temperatures, and a relatively high capacity of 50 mAh g –1 could be well maintained at −80 °C.
Peptide assembly has reached exquisite levels of efficiency in the creation of bioactive materials. However, we have not yet been able to take what we have learned from peptide assembly to develop a general strategy for the fabrication of biomimetic underwater adhesives, which retain significant advantages as medical glue for clinical treatment. Herein we report a simple approach to prepare peptide-based adhesives through the supramolecular polymerization of cationic peptides drove by polyoxometalates (PMs). Mass spectra, Fourier-transform infrared spectra and 183W NMR spectra confirmed the structural integrity of peptides and PMs during the coassembly process. Scanning electron microscopy demonstrated that the multivalent interactions between peptides and polyoxometaltes led to the formation of robust 3D network structures. The rheological study revealed that the peptide/PM assemblies exhibited mechanically rigid gel-like behavior and self-healing property. Interestingly, the assemblies showed the capacity to adhere various wet solid materials under waterline. The shear strength of the peptide-based adhesives are stronger than that of the commercially available fibrin glue. This finding is exciting and serves to expand our capability of the fabrication of peptide-based materials.
危险品化学品经营许可证（带存储）