Mechanistic investigation of silicon-graphite/LiNi0.8Mn0.1Co0.1O2 commercial cells for non-intrusive diagnosis and prognosis

被引:75
作者
Ansean, D. [1 ]
Baure, G. [2 ]
Gonzalez, M. [1 ]
Camean, I [3 ]
Garcia, A. B. [3 ]
Dubarry, M. [2 ]
机构
[1] Univ Oviedo, Polytech Sch Engn, Dept Elect Engn, Gijon 33204, Asturias, Spain
[2] Univ Hawaii Manoa, Hawaii Nat Energy Inst, 1680 East West Rd,Post 109, Honolulu, HI 96822 USA
[3] CSIC, Inst Nacl Carbon, Francisco Pintado Fe 26, Oviedo 33011, Asturias, Spain
关键词
Silicon-graphite; Nickel-rich; NMC; 811; Incremental capacity; Mechanistic model simulations; Battery degradation mapping; OPERATIONS PATH DEPENDENCE; LITHIUM-ION BATTERIES; 18650; NICKEL-RICH; ANODE MATERIALS; DEGRADATION DIAGNOSIS; SILICON; PERFORMANCE; RELIABILITY; PERSPECTIVE; DURABILITY;
D O I
10.1016/j.jpowsour.2020.227882
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Due to their high energy density, lithium-ion batteries with blended silicon-graphite (Si-Gr) anodes and nickel-rich (NMC) cathodes have been regarded as one of the most promising technologies for next-generation consumer electronics and electric vehicles. However, there are still several technical challenges to overcome for successful wide-spread adoption; in particular, deciphering the degradation phenomena remains complex and challenging, as the blended nature of the electrode creates a new paradigm, with the Si/Gr ratio likely changing with aging. Although ex-situ techniques have been used, a set of in-operando tools that enable diagnosis and prognosis on this technology has yet to be developed. Herein, we present a mechanistic investigation that generates a complete degradation mapping coupled with proposed aging features of interest, to attain accurate diagnosis and prognosis. The mechanistic model allows analyzing aging modes that display incubation periods as a potential prelude to thermodynamic plating, and the identification via incremental capacity of unique silicon features that change predictably as it degrades. A comprehensive look-up table summarizing key features is provided to provide support both to scientists and engineers on designing next-generation battery management systems for this technology.
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页数:7
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