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Title: Establishing substitution rules of functional groups for high-capacity organic anode materials in Na-ion batteries

Journal Article · · Journal of Power Sources
 [1];  [1]; ORCiD logo [2];  [3];  [2];  [2];  [4]; ORCiD logo [1]
  1. George Mason Univ., Fairfax, VA (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
  3. Univ. of Maryland, College Park, MD (United States)
  4. Argonne National Lab. (ANL), Lemont, IL (United States); Stanford Univ., CA (United States)

Tailoring molecular structures of organic electrode materials (OEMs) can enhance their performance in Na-ion batteries, however, the substitution rules and the consequent effect on the specific capacity and working potential remain elusive. Herein, by examining three sodium carboxylates with selective N substitution or extended conjugation structure, we exploited the correlation between structure and performance to establish substitution rules for high-capacity OEMs. Our results show that substitution position and types of functional groups are essential to create active centers for uptake/removal of Na+ and thermodynamically stabilize organic structures. Furthermore, rational host design and electrolytes modulation were performed to extend the cycle life to 500 cycles. A full cell based on the optimal 2,2’-bipyridine-4,4’-dicarboxylic acid disodium salt anode and the polyaniline cathode is demonstrated to confirm the feasibility of achieving all-organic batteries. Lastly, this work provides a valuable guideline for the design principle of high-capacity and stable OEMs for sustainable energy storage.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office - Battery Materials Research (BMR) Program; National Science Foundation (NSF)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1880098
Journal Information:
Journal of Power Sources, Journal Name: Journal of Power Sources Vol. 533; ISSN 0378-7753
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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