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Topochemical Deintercalation of Li from Layered LiNiB: toward 2D MBene

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.0c11397· OSTI ID:1772549
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [8];  [2];  [8];  [8];  [8];  [8];  [8];  [2];  [3];  [2]
  1. Iowa State Univ., Ames, IA (United States); Iowa State University
  2. Iowa State Univ., Ames, IA (United States)
  3. Univ. of Antwerp (Belgium)
  4. Argonne National Lab. (ANL), Lemont, IL (United States)
  5. Columbia Univ., New York, NY (United States)
  6. Ames Lab., and Iowa State Univ., Ames, IA (United States); Univ. of Science and Technology of China, Hefei (China)
  7. Yantai Univ. (China)
  8. Ames Lab., and Iowa State Univ., Ames, IA (United States)
The pursuit of two-dimensional (2D) borides, MBenes, has proven to be challenging, not the least because of the lack of a suitable precursor prone to the deintercalation. Here, we studied room-temperature topochemical deintercalation of lithium from the layered polymorphs of the LiNiB compound with a considerable amount of Li stored in between [NiB] layers (33 at. % Li). Deintercalation of Li leads to novel metastable borides (Li~0.5NiB) with unique crystal structures. Partial removal of Li is accomplished by exposing the parent phases to air, water, or dilute HCl under ambient conditions. Scanning transmission electron microscopy and solid-state 7Li and 11B NMR spectroscopy, combined with X-ray pair distribution function (PDF) analysis and DFT calculations, were utilized to elucidate the novel structures of Li~0.5NiB and the mechanism of Li-deintercalation. We have shown that the deintercalation of Li proceeds via a “zip-lock” mechanism, leading to the condensation of single [NiB] layers into double or triple layers bound via covalent bonds, resulting in structural fragments with Li[NiB]2 and Li[NiB]3 compositions. The crystal structure of Li~0.5NiB is best described as an intergrowth of the ordered single [NiB], double [NiB]2, or triple [NiB]3 layers alternating with single Li layers; this explains its structural complexity. Here, the formation of double or triple [NiB] layers induces a change in the magnetic behavior from temperatureindependent paramagnets in the parent LiNiB compounds to the spin-glassiness in the deintercalated Li~0.5NiB counterparts. LiNiB compounds showcase the potential to access a plethora of unique materials, including 2D MBenes (NiB).
Research Organization:
Ames Laboratory (AMES), Ames, IA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States); Iowa State Univ., Ames, IA (United States)
Sponsoring Organization:
Gordon and Betty Moore Foundation; National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
AC02-06CH11357; AC02-07CH11358
OSTI ID:
1772549
Alternate ID(s):
OSTI ID: 1839992
OSTI ID: 1774052
Report Number(s):
IS-J 10,448
Journal Information:
Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 11 Vol. 143; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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