化学研究报告2013-09-05 2:58 AM

Design and Preparation of Materials for Advanced Electrochemical Storage - Accounts of Chemical Research (ACS Publications)

To meet the growing global demand for energy while preserving the environment, it is necessary to drastically reduce the world’s dependence on non-renewable energy sources. At the core of this effort will be the ability to efficiently convert, store, transport and access energy in a variety of ways. Batteries for use in small consumer devices have saturated society; however, if they are ever to be useful in large-scale applications such as automotive transportation or grid-storage, they will require new materials with dramatically improved performance. Efforts must also focus on using Earth-abundant and nontoxic compounds so that whatever developments are made will not create new environmental problems. In this Account, we describe a general strategy for the design and development of new insertion electrode materials for Li(Na)-ion batteries that meet these requirements. We begin by reviewing the current state of the art of insertion electrodes and highlighting the intrinsic material properties of electrodes that must be re-engineered for extension to larger-scale applications. We then present a detailed discussion of the relevant criteria for the conceptual design and appropriate selection of new electrode chemical compositions. We describe how the open-circuit voltage of Li-ion batteries can be manipulated and optimized through structural and compositional tuning by exploiting differences in the electronegativity among possible electrode materials. We then discuss which modern synthetic techniques are most sustainable, allowing the creation of new materials via environmentally responsible reactions that minimize the use of energy and toxic solvents. Finally, we present a case study showing how we successfully employed these approaches to develop a large number of new, useful electrode materials within the recently discovered family of transition metal fluorosulfates. This family has attracted interest as a possible source of improved Li-ion batteries in larger scale applications and benefits from a relatively “green” synthesis.

KEYWORDS

SHARE & LIKE

COMMENTS

ABOUT THE AUTHOR

化学研究报告

0 Following 0 Fans 0 Projects 69 Articles

SIMILAR ARTICLES

Going in vivo, including living cells and the whole body, is very important for gaining a better understanding of the mystery of life and requires spec

Read More

Polytheonamide B (1), isolated from the marine sponge Theonella swinhoei, is a posttranslationally modified ribosomal peptide (MW 5030 Da) that display

Read More

Singlet fission (SF) is a spin-allowed process in which an excited singlet state spontaneously splits into a pair of triplet excitons. This relaxation

Read More

Singlet exciton fission is the process in conjugated organic molecules bywhich a photogenerated singlet exciton couples to a nearby chromophore in the

Read More

Uridine(5′)diphospho(1)α-d-galactose (UDP-gal) provides all galactosyl units in biologically synthesized carbohydrates. All healthy cells produce UDP-g

Read More

The coupling of aryl halides with catalytically activated aryl C–H bondsprovides a desirable and atom-economical alternative to standard cross-coupling

Read More

Acenes are a class of aromatic hydrocarbons composed of linearly fused benzene rings. Noteworthy features of these molecules include their extended fla

Read More

Securing our energy future is the most important problem that humanity faces in this century. Burning fossil fuels is not sustainable, and wide use of

Read More

Certain organic materials can generate more than one electron-hole pair per absorbed photon, a property that could revolutionize the prospects for sola

Read More

Certain organic materials can generate more than one electron-hole pair per absorbed photon, a property that could revolutionize the prospects for sola

Read More