Boron Nitride Nanosheets: High Energy Density Polymer Dielectrics Interlayered by Assembled Boron Nitride Nanosheets (Adv. Energy Mater. 36/2019)

Abstract

In article number 1901826, Xingyi Huang, Qi Li and co‐workers develop novel composite films with a nanosized interlayer of assembled boron nitride nanosheets (BNNSs) that is aligned along the in‐plane direction, representing a new paradigm for high performance dielectric materials. This compact interlayer of assembled BNNSs can largely block the propagation of electrical treeing, giving rise to improved dielectric energy storage performance.

Calcium-intercalated birnessite MnO2 anchored on carbon nanotubes as high-performance cathodes for aqueous zinc-ion batteries

“…This result further indicates the existence of Ca 2+ in the CNT-CaMO sample. 43 Moreover, the Mn, O, and C spectra of CNT-MnO 2…”

Interlayer Modification of Pseudocapacitive Vanadium Oxide and Zn(H2O)n2+ Migration Regulation for Ultrahigh Rate and Durable Aqueous Zinc‐Ion Batteries

“…have also been introduced by ion pillaring and deliver effectively improved stability of vanadium oxide cathode. [20][21][22] However, in these battery-type intercalation materials, kinetics limited by ion diffusion process and their energy storage performance is still not satisfactory. Also, a type of intercalation pseudocapacitive energy storage is easier to obtain high rate performance, with Faradaic charge transfer without crystallographic phase change.…”

Pseudocapacitive storage in cathode materials of aqueous zinc ion batteries toward high power and energy density

“…It is worth noting that the energy density of the prepared AZIB is comparable to LiCoO 2 /graphite batteries, while the power density is 30 times higher than that of LiCoO 2 / graphite batteries. 36 However, there is a depressing fact that the shielding effect on charges can be weakened with the loss of structural water during charge/discharge processes, leading to the destruction of the V 2 O 5 layered structure during Zn 2+ intercalation. 84 To avoid this problem, intercalating metallic ions, such as Li + , 38 Na + , 85 Mg 2+ , 86 Al 3+ , 87 Ag + , 88 and Mn 2+ , 89 is an effective approach to stabilize electrochemical performance.…”

“…Up to now, some kinds of cathode materials for AZIBs have been reported such as manganese-based oxides, [16][17][18][19][20] vanadium-based derivatives, [21][22][23][24] Prussian blue analogs (PBAs), 25,26 polyanions 27-29 organic compounds, [30][31][32] etc. In the meantime, various preparation strategies for electrode materials have been proposed, including engineering the morphology and structure, [33][34][35] preintercalation of cations (such as Li + , Na + , and Ca 2+ ) and structural H 2 O molecules, [36][37][38][39] defect engineering (including doping and vacancies) 20,40 and composite design [41][42][43] (with graphene, MXenes, etc.). Through these advanced strategies, the specic capacity and cycling stability of AZIBs have achieved great enhancement.…”