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Asymmetric K/Li-Ion Battery Based on Intercalation Selectivity

Journal Article · · ACS Energy Letters
 [1];  [1];  [1];  [2];  [3];  [1];  [1];  [4];  [5];  [1];  [5];  [1]
  1. Peking Univ., Shenzhen (China)
  2. Peking Univ., Shenzhen (China); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source
  4. Shenzhen Univ. (China); Shenzhen Key Lab. of Special Functional Materials (China)
  5. Argonne National Lab. (ANL), Argonne, IL (United States)

In this paper, using ab initio calculations combined with experimental confirmation, we design an asymmetric intercalation battery using K2NiFeII(CN)6 as the cathode, commercial graphite as the anode, and an organic electrolyte containing mixed lithium and potassium salts. It works by reversible K-ion intercalation at the cathode side and reversible Li-ion intercalation at the anode side simultaneously. The π-electron coordination environment in K2NiFeII(CN)6 ensures the preferred reversible intercalation of the K-ion, and the small ionic radius ensures the preferred reversible intercalation of the Li-ion in graphite. Finally, it also shows a high working voltage (~3.6 V) and an ultralong cycling life with no capacity fading even after 5000 cycles.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Natural Science Foundation of China (NSFC); Shenzhen Science and Technology Research Grant; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1461414
Journal Information:
ACS Energy Letters, Journal Name: ACS Energy Letters Journal Issue: 1 Vol. 3; ISSN 2380-8195
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Reversible intercalation of methyl viologen as a dicationic charge carrier in aqueous batteries journal July 2019

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