Two‐dimensional Boron Nitride for Electronics and Energy Applications

Abstract

Two‐dimensional (2D) boron nitride (BN), the so‐called “white graphene,” has demonstrated a great potential in various fields, particularly in electronics and energy, by utilizing its wide bandgap (~5.5 eV), superior thermal stability, high thermal conductance, chemical inertness, and outstanding dielectric properties. However, to further optimize the performances from the view of structure–property relationship, the determinative factors such as crystallite sizes, layer thickness, dispersibility, and surface functionalities should be precisely controlled and adjusted. Therefore, in this review, the synthesis and functionalization methods including “top‐down” and “bottom‐up” strategies, and non‐covalent and covalent modifications for 2D BN are systematically classified and discussed at first, thus catering for the requirements of versatile applications. Then, the progresses of 2D BN applied in the fields of microelectronics such as field‐effect transistors and dielectric capacitors, energy domains such as thermal energy management and conversion, and batteries and supercapacitors are summarized to highlight the importance of 2D BN. Notably, these contents not only contain the state‐of‐the‐art 2D BN composites, but also bring the current novel design of 2D BN‐based microelectronic units. Finally, the challenges and perspectives are proposed to better broaden the scope of this material. Therefore, this review will pave an all‐around way for understanding, utilizing, and applying 2D BN in future electronics and energy applications.

Advances in Studies of Boron Nitride Nanosheets and Nanocomposites for Thermal Transport and Related Applications

“…A major use of BNNs is in polymeric nanocomposites for thermal transport properties and others that take advantage of ChemPhysChem the mechanical and chemically stable characteristics. The focus here is on the former, [7,[13][14][15][16][17][18][19][20][21][22][23][24][25]33,95,102,112,133,[135][136][137][138] and those who are interested in the latter are referred to other reviews. [19,23,26,[267][268][269][270] As nanoscale fillers in polymeric nanocomposites, BNNs are unique for their high thermal conductivity but no electrical conductivity, particularly suitable for applications that require electrical insulation, thus beyond the reach of their carbon counterparts graphene nanosheets.…”

“…As a result, there have been more recent investigations on the development of thermally conductive polymer/BNNs nanocomposites for thermal management and related uses. [7,[13][14][15][16][17][18][19][20][21][22][23][24][25]33,95,102,112,133,[135][136][137][138]…”

“…BNNs retain the advantageous characteristics of h-BN, yet at the same time possess the desired features of nanomaterials, such as large 2D aspect ratios and solvent dispersibility, making BNNs excellent nanoscale fillers for polymeric nanocomposite materials. [6,7,[13][14][15][16][17][18][19][20][21][22][23][24][25] In fact, there have been extensive recent investigations on the development of polymer/BNNs nanocomposites for thermal management and other applications.…”

“…The excitement associated with the single‐ and multi‐layer graphene nanosheets has stimulated a similar intensive interest in few‐layer BN nanosheets (BNNs, Figure 1) [7] for their different properties from those of graphite and h‐BN, respectively. BNNs retain the advantageous characteristics of h‐BN, yet at the same time possess the desired features of nanomaterials, such as large 2D aspect ratios and solvent dispersibility, making BNNs excellent nanoscale fillers for polymeric nanocomposite materials [6,7,13–25] . In fact, there have been extensive recent investigations on the development of polymer/BNNs nanocomposites for thermal management and other applications.…”

Platin‐vermittelte Kupplung von B=N‐Einheiten: Synthese von BNBN‐Analoga von 1,3‐Dienen und Butatrien

“…Während die typische B = N-Doppelbindung (1.39 ) [1] nur unwesentlich länger als die C=C-Doppelbindung (1.34 , Abbildung 1) ist, verleiht die intrinsisch starke Polarisation der B-N-Bindung den resultierenden Molekülen und Materialien sehr unterschiedliche elektronische Eigenschaften und Stabilität, die für neue Anwendungen im Bereich der Materialwissenschaften, der Katalyse und der medizinischen Chemie genutzt werden kçnnen. Seit der bahnbrechenden Synthese von Borazin durch Stock und Pohland im Jahr 1926 (Abbildung 1, I) [2] ermçglichten neue Synthesemethoden den Zugang zu einer immer grçßeren Vielfalt von B=N/C=Cisosteren Verbindungen und Materialien, wie Bornitrid- [3] und Borcarbonitrid (B x C y N z )-Nanomaterialien, [4] hybride organisch-anorganische BN-dotierte konjugierte Polymere, [5] (poly)aromatische Verbindungen [6] und kleine aromatische Moleküle. [7] Trotzdem sind wohldefinierte acyclische konjugierte BN-Ketten, wie Poly(iminoborane) (III) oder BN-basierte Cumulene (IV), weiterhin schwer zugänglich.…”