Controllable synthesis of borophene aerogels by utilizing h-BN layers for high-performance next-generation batteries

Niyazi Okan Çiftçi, Sevil Berrak Sentürk, Yaren Sezen, Süreyya Üstün Kaykusuz, Hu Long, Onur Ergen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Borophene is emerging as a promising electrode material for Li, Na, Mg, and Ca ion batteries due to its anisotropic Dirac properties, high charge capacity, and low energy barrier for ion diffusion. However, practical synthesis of active and stable borophene remains challenging in producing electrochemical devices. Here, we introduce a method for borophene aerogels (BoAs), utilizing hexagonal boron nitride aerogels. Borophene grows between h-BN layers utilizing boron-boron bridges, as a nucleation site, where borophene forms monolayers mixed with sp2-sp3 hybridization. This versatile method produces stable BoAs and is compatible with various battery chemistries. With these BoAs, we accomplish an important milestone to successfully fabricate high-performance next-generation batteries, including Na-ion (478 mAh g-1, at 0.5C, >300 cycles), Mg-ion (297 mAh g-1, at 0.5C,>300 cycles), and Ca-ion (332 mAh g-1, at 0.5C, >400 cycles), and Li-S batteries, with one of the highest capacities to date (1,559 mAh g-1, at 0.3C, >1,000 cycles).

Original languageEnglish
Article numbere2307537120
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number42
Publication statusPublished - 2023

Bibliographical note

Publisher Copyright:
Copyright © 2023 the Author(s).


O.E. acknowledges European-Research-Council (QUEEN: 01043219) and Zettl's Lab/UC-Berkeley.

FundersFunder number
H2020 European Research Council01043219


    • aerogels
    • borophene
    • next-generation batteries
    • sodium
    • sulfur


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