DOW CORNING 1-2577 Conformal Coating as an efficient diffusion material for cathode in the microbial fuel cell

In this study, DOW CORNING 1-2577 Con- formal Coating was proposed for the cathode diffusion layer of the microbial fuel cell （MFC）. In MFCs, stainless steel mesh cathodes using DOW CORN1NG 1-2577 Conformal Coating/carbon as the diffusion layer and two poly （dimethylsiloxane） （PDMS）/carbon diffusion layers and carbon cloth cathode with four poly （tetrafluoroethy- lene） （PTFE） diffusion layers were constructed for comparison. Under the same operational condition, the MFCs with the DOW CORNING 1-2577 Conformal Coating/carbon diffusion layer produced the maximum power density of 1585q-52mW-m2, compared with those using poly （tetrafluoroethylene） （PTFE） diffusion layers （1421 ~45 mW. m-2） and poly （dimethylsiloxane） （PDMS）/carbon diffusion layers （13534-49 mW. m-E）. The DOW CORNING 1-2577 Conformal Coating could be an alternative for the diffusion layer construction in the MFC due to its remarkable performance and much simple construction procedure.

Dual-Carbon-Confined SnS Nanostructure with High Capacity and Long Cycle Life for Lithium-ion Batteries

SnS with high theoretical capacity is a promising anode material for lithiumion batteries.However,dramatic volume changes of SnS during repeated discharge/charge cycles result in fractures or even pulverization of electrode,leading to rapid capacity degradation.To solve this problem,we construct a dual-carbon-confined SnS nanostructure(denoted as SnS@C/rGO)by depositing semi-graphitized carbon layers on reduced graphene oxide(rGO)supported SnS nanoplates during high-temperature reduction.The dual carbon of rGO and in situ formed carbon coating confines growth of SnS during the high-temperature calcination.Moreover,during the reversible Li+storage the dual-carbon modification enables good electronic conductivity,relieves the volume effect,and provides double insurance for the electrical contact of SnS even after repeated cycles.Benefiting from the dual-carbon confinement,SnS@C/rGO exhibits significantly enhanced rate capability and cycling stability compared with the bare and single carbon modified SnS.SnS@C/rGO presents reversible capacity of 1029.8 mAh g^(-1)at 0.2 A g^(-1).Even at a high current density of 1 A g^(-1),it initially delivers reversible capacity of 934.0 mAh g^(-1)and retains 98.2%of the capacity(918.0 mAh g^(-1))after 330 cycles.This work demonstrates potential application of dual-carbon modification in the development of electrode materials for high-performance lithium-ion batteries.

Self-adaptive phosphor coating technology for wafer-level scale chip packaging

A new self-adaptive phosphor coating technology has been successfully developed, which adopted a slurry method combined with a self-exposure process. A phosphor suspension in the water-soluble photoresist was applied and exposed to LED blue light itself and developed to form a conformal phosphor coating with self- adaptability to the angular distribution of intensity of blue light and better-performing spatial color uniformity. The self-adaptive phosphor coating technology had been successfully adopted in the wafer surface to realize a wafer- level scale phosphor conformal coating. The first-stage experiments show satisfying results and give an adequate demonstration of the flexibility of self-adaptive coating technology on application of WLSCP.

Advantages and challenges of self-assembled monolayer as a hole-selective contact for perovskite solar cells

Charge-transporting layers(CTLs)are important in determining the performance and stability of perovskite solar cells(PSCs).Recently,there has been considerable use of self-assembled monolayers(SAMs)as charge-selective contacts,especially for hole-selective SAMs in inverted PSCs as well as perovskite involving tandem solar cells.The SAM-based charge-selective contact shows many advantages over traditional thin-film organic/inorganic CTLs,including reduced cost,low optical and electric loss,conformal coating on a rough substrate,simple deposition on a large-area substrate and easy modulation of energy levels,molecular dipoles and surface properties.The incorporation of various hole-selective SAMs has resulted in high-efficiency single junction and tandem solar cells.This topical review summarizes both the advantages and challenges of SAM-based charge-selective contacts,and discusses the potential direction for future studies.