Reversible control of charge transport and magnetic properties without degradation is a key for device applications of transition metal oxides. Chemical doping during the growth of transition metal oxides can result in large changes in physical properties, but in most of the cases irreversibility is an inevitable constraint. Here we report a reversible control of charge transport, metal-insulat...

The 2D electron gas at the polar/non-polar oxide interface has become an important platform for several novel oxide electronic devices. In this paper, the transport properties of a wide range of polar perovskite oxide ABO3/SrTiO3 (STO) interfaces, where ABO3 includes LaAlO3, PrAlO3, NdAlO3, NdGaO3 and LaGaO3 in both crystalline and amorphous forms, were investigated. A robust 4 unit cell (uc) c...

Anode-supported micro-tubular solid oxide fuel cell (SOFC) offers many advantages over the electrolyte and cathode-supported confgurations in terms of simplicity, reliability, and efciency. In such design, the anode substrates should possess a highly porous structure, provide active sites reaction as well as serving good mechanical strength. This structure is desired to ...

Abstract It is a privilege for me to write the brief perspective on transition of John B. Goodenough from Oxford University Texas at Austin (UT Austin). While most people will tend retire, transitioned UT age 64 in 1986 and has been making phenomenal contributions during past 35 years, with genuine passion science profound impact society large. To highlight few, include following: chemistry phy...

Binary transition metal oxides TiOx, NiOx, HfOx, AlOx, TaOx have been recently proposed as possible materials for embedded non-volatile memory modules. Currently, a major bottleneck in determining the scalability, retention and endurance of these devices, is the lack of detailed understanding of resistive switching mechanism. Generally, the process of forming in transition metal oxides systems ...

Transition metal oxides have been suggested as innovative, high-energy electrode materials for lithium-ion batteries because their electrochemical conversion reactions can transfer two to six electrons. However, nano-sized transition metal oxides, especially Co3O4, exhibit drastic capacity decay during discharge/charge cycling, which hinders their practical use in lithium-ion batteries. Herein,...

DOI: 10.1002/aenm.201501933 one of the most promising lithium-based batteries, the Li-S batteries are appealing as both the sulfur cathode and the lithiummetal anode offer an order of magnitude higher charge-storage capacity compared to the currently used insertion-compound electrodes. [ 16,17 ] In addition, sulfur is abundant and environmentally benign while lithium metal offers a desirable lo...

Fuel cells, and in particular solid-oxide fuel cells (SOFCs), enable high-efficiency conversion of chemical fuels into useful electrical energy and, as such, are expected to play a major role in a sustainable-energy future. A key step in the fuel-cell energy-conversion process is the electro-oxidation of the fuel at the anode. There has been increasing evidence in recent years that the presence...

Lithium metal is one of the most attractive anode materials for electrochemical energy storage. However, the growth of Li dendrites during electrochemical deposition, which leads to a low Coulombic efficiency and safety concerns, has long hindered the application of rechargeable Li-metal batteries. Here we show that a 3D current collector with a submicron skeleton and high electroactive surface...

In this paper, we discuss the effect of flexible substrates on the characteristics of two organic optoelectronic devices, namely P3HT:PCBM-based photovoltaic bulk heterojunctions and pentacene-based phototransistors. In addition, we have developed anode materials deposited by ion beam sputtering, a technique which satisfies the low temperature deposition requirements associated with the use of ...