Biocompatible devices are widely employed in modernized lives and medical fields in the forms of wearable and implantable devices, raising higher requirements on the battery biocompatibility, high safety, low cost, and excellent electrochemical performance, which become the evaluation criteria toward developing feasible biocompatible batteries. Herein, through conducting the battery implantation tests and leakage scene simulations on New Zealand rabbits, zinc sulfate electrolyte is proved to exhibit higher biosecurity and turns out to be one of the ideal zinc salts for biocompatible zinc-ion batteries (ZIBs). Furthermore, in order to mitigate the notorious dendrite growth and hydrogen evolution in mildly acidic electrolyte as well as improve their operating stability, Sn hetero nucleus is introduced to stabilize the zinc anode, which not only facilitates the planar zinc deposition, but also contributes to higher hydrogen evolution overpotential. Finally, a long lifetime of 1500 h for the symmetrical cell, the specific capacity of 150 mAh g-1 under 0.5 A g-1 for the Zn–MnO2 battery and 212 mAh g-1 under 5 A g-1 for the Zn—NH4V4O10 battery are obtained. This work may provide unique perspectives on biocompatible ZIBs toward the biosecurity of their cell components.

High degrees of freedom (DOF) for K+ movement in the electrolytes is desirable, because the resulting high ionic conductivity helps improve potassium-ion batteries, yet requiring support from highly free and flammable organic solvent molecules, seriously affecting battery safety. Here, we develop a K+ flux rectifier to trim K ion’s DOF to 1 and improve electrochemical properties. Although the ionic conductivity is compromised in the K+ flux rectifier, the overall electrochemical performance of PIBs was improved. An oxidation stability improvement from 4.0 to 5.9 V was realized, and the formation of dendrites and the dissolution of organic cathodes were inhibited. Consequently, the K||K cells continuously cycled over 3,700 h; K||Cu cells operated stably over 800 cycles with the Coulombic efficiency exceeding 99%; and K||graphite cells exhibited high-capacity retention over 74.7% after 1,500 cycles. Moreover, the 3,4,9,10-perylenetetracarboxylic diimide organic cathodes operated for more than 2,100 cycles and reached year-scale-cycling time. We fabricated a 2.18 Ah pouch cell with no significant capacity fading observed after 100 cycles.

研究了1.06μmNd:YAG脉冲激光辐照LiF晶体在表面和体内所引起的损伤形貌以及在辐照位置周围的位错分布.这些位错是由于辐照位置处样品中存在的包裹物等杂质引起的不均匀吸收而产生的.

研究了CO2脉冲激光辐照LiF晶体的(100）面,在表面层引起的特征位错分布,它是由于表面层吸收辐照能量后产生的热弹应力引起的。