Capping Black Phosphorene by h-BN Enhances Performances in Anodes for Li and Na Ion Batteries
| Autor: | Chandra Chowdhury, Ayan Datta, Sharmistha Karmakar |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Chemistry Sodium Binding energy Analytical chemistry Energy Engineering and Power Technology Mineralogy chemistry.chemical_element Heterojunction 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Anode Ion Phosphorene chemistry.chemical_compound Fuel Technology Chemistry (miscellaneous) Materials Chemistry Direct and indirect band gaps Lithium 0210 nano-technology |
| Zdroj: | ACS Energy Letters. 1:253-259 |
| ISSN: | 2380-8195 |
| Popis: | Black phosphorus (BP), despite possessing a favorable direct band gap, suffers from structural instability at ambient conditions that limits its utility for lithium ion batteries (LIB). In this Letter, we have proposed h-BN as an effective capping agent for black-phosphorene (Pn) for application as an anode material in both LIBs and sodium ion batteries (SIBs). The binding energy of Li/Na in the h-BN/black-Pn heterostructure is greatly enhanced (2.81 eV/2.55 eV) vis-a-vis pristine Pn (1.80 eV/1.59 eV) along with reduction in the barrier for movement of Li/Na within the layers. Significantly, lithiation/sodiation of these heterostructures does not alter the packing patterns due to insignificant volume changes (∼1.5–2.0%). The theoretical specific capacities for h-BN/black-Pn is 607 and 445 mA h g–1 for LIB and SIB, respectively, which are larger than those for existing commercial anode materials. Clearly, the high capacity, low open-circuit voltage, small volume change, and high mobility of Li/Na within th... |
| Databáze: | OpenAIRE |
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