Using Anion Exchange Membrane Adsorbers to Ensure Effective Virus Clearance of Challenging Parvoviruses
April 2, 2021
Sherri Dolan , Paul Nolan , Stephen Carey , Craig Quinney , Lorna Littlejohn
BioPharm International, BioPharm International-04-01-2021, Volume 34, Issue 4
Pages: 32–37
https://t.cn/A6c5H6yr
April 2, 2021
Sherri Dolan , Paul Nolan , Stephen Carey , Craig Quinney , Lorna Littlejohn
BioPharm International, BioPharm International-04-01-2021, Volume 34, Issue 4
Pages: 32–37
https://t.cn/A6c5H6yr
ABX3 type metal halide perovskite has attracted extensive attention in the field of absorbing light energy and thin film photovoltaic devices, and has a high application prospect. ABX3 perovskite has many components, among which the traditional cubic α - phase fabbi3 has excellent efficiency and stability as a solar cell material. Therefore, the effective optimization of its performance is very important for the related research of perovskite solar cells. In view of this, Jin young Kim of USST, Michael gr ü tzel and Anders hagfeldt of EPFL, Dong Suk Kim of kier, etc. launched the latest work on nature on April 5, 2021. In this paper, through a kind of "anion Engineering", the anionic defect sites in perovskite films and grain boundaries were eliminated by halogen-like anion HCOO -, and the crystallinity of perovskite films was improved.
The maximum efficiency of HCOO halide anion treated cell is 25.6% (certified cell efficiency is 25.2%). The cell can work stably for 450 hours, and the external quantum efficiency of electroluminescence intensity is 10%. This paper provides a direct method to eliminate a large number of harmful lattice defects in perovskite solar films, and gives a solution to improve the performance of perovskite solar films.
The maximum efficiency of HCOO halide anion treated cell is 25.6% (certified cell efficiency is 25.2%). The cell can work stably for 450 hours, and the external quantum efficiency of electroluminescence intensity is 10%. This paper provides a direct method to eliminate a large number of harmful lattice defects in perovskite solar films, and gives a solution to improve the performance of perovskite solar films.
A kind of water proton (H +) battery can obtain both high energy density and high power density under low T condition
1. In this system, H + was stored reversibly on alloxan (alo) based anode and Mn2 + / MnO2 reversibly on carbon fiber felt (CF) based cathode. Using an aqueous solution of 2 m HBF4 + 2 m Mn (BF4) 2 as electrolyte, it shows a freezing point below − 160 ℃ and a high ionic conductivity of 0.21 MS cm-1 at − 70 ℃. It is confirmed that BF4 anion can effectively destroy the hydrogen bond (H-bond) network of the original water molecules, resulting in the ultra-low freezing point.
2. Density functional theory (DFT) calculation and comprehensive characterization further proved the absorption / removal reaction of H + in alo electrode. The de alo / / 2m HBF4 + 2m Mn (BF4) 2 / / CF battery was assembled with suitable electrolyte and electrode materials. When t dropped to − 60 ° C, the high discharge capacity of 100 mahg-1 could be provided at a current density of 6C (1.5 AG-1). Meanwhile, based on the active anode mass calculation, the energy density and power density of the device were 110 whkg-1 and 1650 wkg-1, respectively.
3. At − 60 ° C and 4 C (1 a g-1) current density, the system has almost no capacity decay after 400 cycles, showing good stability. At − 90 ° C, the specific discharge capacity can still reach 85 mahg-1.
1. In this system, H + was stored reversibly on alloxan (alo) based anode and Mn2 + / MnO2 reversibly on carbon fiber felt (CF) based cathode. Using an aqueous solution of 2 m HBF4 + 2 m Mn (BF4) 2 as electrolyte, it shows a freezing point below − 160 ℃ and a high ionic conductivity of 0.21 MS cm-1 at − 70 ℃. It is confirmed that BF4 anion can effectively destroy the hydrogen bond (H-bond) network of the original water molecules, resulting in the ultra-low freezing point.
2. Density functional theory (DFT) calculation and comprehensive characterization further proved the absorption / removal reaction of H + in alo electrode. The de alo / / 2m HBF4 + 2m Mn (BF4) 2 / / CF battery was assembled with suitable electrolyte and electrode materials. When t dropped to − 60 ° C, the high discharge capacity of 100 mahg-1 could be provided at a current density of 6C (1.5 AG-1). Meanwhile, based on the active anode mass calculation, the energy density and power density of the device were 110 whkg-1 and 1650 wkg-1, respectively.
3. At − 60 ° C and 4 C (1 a g-1) current density, the system has almost no capacity decay after 400 cycles, showing good stability. At − 90 ° C, the specific discharge capacity can still reach 85 mahg-1.
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