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Prelithiated Li-Enriched Gradient Interphase toward Practical High-Energy NMC–Silicon Full Cell

Journal Article · · ACS Energy Letters
 [1];  [2];  [3];  [1];  [1];  [4];  [4];  [5];  [5];  [6];  [6];  [3];  [2];  [2];  [1]
  1. Huazhong Univ. of Science and Technology, Wuhan (China)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Peking Univ., Shenzhen (China)
  4. Univ. of Illinois, Chicago, IL (United States)
  5. China Electronic New Energy Research Inst. Co., Wuhan (China)
  6. Brookhaven National Lab. (BNL), Upton, NY (United States)
+ Show Author Affiliations
It is highly desirable to realize high-energy-density lithium-ion batteries consisting of nickel-rich layered oxide cathodes (Ni-rich NMC) and Si-based anodes. A critical challenge for Ni-rich NMC is its fast capacity degradation. In addition, the low initial Coulombic efficiency of the Si-based anode consumes the electrochemically active lithium from the cathode and decreases the energy density of full batteries considerably. Here, we consider cathode and anode as a whole to simultaneously resolve the issues of both sides. Ni-rich LiNi0.65Mn0.20Co0.15O2 (LR-Ni65) consisting of a lithium-enriched gradient interphase layer (~20 nm) is designed to supply excess electrochemically active lithium to compensate lithium loss at the anode and enhance cycling stability through regulating Li/Ni disorder in the cathode structure. We show that a LR-Ni65||Si/graphite pouch cell displays a capacity (3.29 Ah) greater than that for the counterpart using pristine Ni-rich NMC (2.95 Ah), as well as enhanced cycling stability with 88% capacity retention. The good compatibility with current Ni-rich NMC processing and facile synthesis make the as-fabricated cathode material promising for practical commercial application.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
Guangdong Basic and Applied Basic Research Foundation; National Natural Science Foundation of China (NNSFC); USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC)
Grant/Contract Number:
AC02-06CH11357; SC0012704
OSTI ID:
1756180
Alternate ID(s):
OSTI ID: 1831727
OSTI ID: 1880647
Report Number(s):
BNL--220766-2020-JAAM
Journal Information:
ACS Energy Letters, Journal Name: ACS Energy Letters Journal Issue: 2 Vol. 6; ISSN 2380-8195
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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25 ENERGY STORAGE
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