A Covalent Black Phosphorus/Metal–Organic Framework Hetero‐nanostructure for High‐Performance Flexible Supercapacitors

Biological Effects of Black Phosphorus Nanomaterials on Mammalian Cells and Animals

The remarkable progress of applied black phosphorus nanomaterials (BPNMs) is attributed to BP's outstanding properties. Due to its potential for applications, environmental release and subsequent human exposure are virtually inevitable. Therefore, how BPNMs impact biological systems and human health needs to be considered. In this comprehensive Minireview, the most recent advancements in understanding the mechanisms and regulation factors of BPNMs' endogenous toxicity to mammalian systems are presented. These achievements lay the groundwork for an understanding of its biological effects, aimed towards establishing regulatory principles to minimize the adverse health impacts.

Microfluidic Fabrication of Hierarchical-Ordered ZIF-L(Zn)@Ti3 C2 Tx Core-Sheath Fibers for High-Performance Asymmetric Supercapacitors

We report hierarchical-ordered ZIF-L(Zn)@Ti₃ C₂ T_x MXene core-sheath fibers, in which a ZIF-L(Zn) nanowall array sheath is grown vertically on an anisotropic Ti₃ C₂ T_x core by Ti-O-Zn/Ti-F-Zn chemical bonds. Through highly efficient microfluidic assembly and microchannel reactions, ZIF-L(Zn)@Ti₃ C₂ T_x exhibits well-developed micro-/mesoporosity, ordered ionic pathways, fast interfacial electron conduction and large-scale fabrication, significantly boosting charges dynamic transport and intercalation. The resultant ZIF-L(Zn)@Ti₃ C₂ T_x fiber presents large capacitance (1700 F cm^-3 ) and outstanding rate performance in a 1 M H₂ SO₄ electrolyte. Additionally, ZIF-L(Zn)@Ti₃ C₂ T_x fiber-based solid-state asymmetric supercapacitors deliver high energy density (19.0 mWh cm^-3 ), excellent capacitance (854 F cm^-3 ), large deformable/wearable capabilities and long-time cyclic stability (20 000 cycles), which realize natural sunlight-induced self-powered applications to drive water level/earthquake alarm devices.

Covalently Aligned Molybdenum Disulfide-Carbon Nanotubes Heteroarchitecture for High-Performance Electrochemical Capacitors

Advanced two-dimensional nanosheets that promote the dynamic transportation and storage capacity of ions are significant for high-performance electrochemical capacitors (ECs). However, such materials often possess a low energy density. We have developed an ordered heteroarchitecture of molybdenum disulfide-carbon nanotubes (MoS₂ -CNTs) in which CNTs are vertically grafted within a MoS₂ framework by C-Mo covalent bonds. Benefiting from this in situ vertical bridge, high-speed interlaminar conductivity, unimpeded ion-diffusion channels and sufficient pseudocapacitive reactivity, the MoS₂ -CNTs presents ultralarge capacitance (5485 F g^-1 ) and good structural stability in potassium hydroxide electrolyte. Moreover, the all-unified solid-state flexible ECs obtained through direct-write printing construction deliver high energy density (226 mWh g^-1 ), good capacitance (723 F g^-1 ) and stable high/low-temperature operating ability, which can power a wearable health-monitoring device.