Extending the Service Life of High‐Ni Layered Oxides by Tuning the Electrode–Electrolyte Interphase

By Jianyu Li, Wangda Li, Ya You, Arumugam Manthiram. Advanced Energy Materials, 2018

188 citations recorded by the source corpus.

As a high‐energy‐density cathode for Li‐ion batteries, high‐Ni layered oxides, especially with ultrahigh Ni‐content, suffer from short lifespans, due in part to their unstable electrode–electrolyte interphase (EEI). Herein, the cycle life of LiNi0.94Co0.06O2 is greatly extended by manipulating the EEI with a lithium bis(oxalate) (LiBOB) additive even when operated at a moderately high voltage (4.4 V vs Li/Li+). Impressively, the capacity retention can be increased from 61 to 80% after 500 cycles in a full cell paired with a graphite anode. Additionally, the presence of LiBOB enables a robust boron‐ and oxygen‐enriched EEI that effectively inhibits continual electrolyte decomposition and offers a stable cathode surface. Moreover, the layered architecture of the cathode–electrolyte interphase (CEI) and the anode–electrolyte interphase (AEI) at the nanometer scale is revealed by time‐of‐flight secondary ion mass spectrometry. It is demonstrated that the cathode surface chemistry can significantly influence the AEI both chemically and physically, and AEI is modified from a thick “three‐layer” to a thin “two‐layer” architecture by tuning the cathode surface chemistry with LiBOB. This work presents a correlation between the EEI characteristics and battery performance and highlights the significance of manipulating surface chemistry in developing stable high‐energy‐density Li‐ion batteries.

Subfields: Automotive Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/5d351d0fe89b8b3751831f734c792e267b4847fc

How researchers see this paper

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In Automotive Engineering

1. Ji‐Guang Zhang
2. Arumugam Manthiram
3. Wu Xu
4. Yi Cui
5. Jun Liu
6. Jie Xiao
7. Qiang Zhang
8. John B. Goodenough

In Electrical and Electronic Engineering

1. Arumugam Manthiram
2. Yi Cui
3. Ji‐Guang Zhang
4. Jun Liu
5. Wu Xu
6. Jie Xiao
7. Qiang Zhang
8. John B. Goodenough

Citations in the corpus

• Pathways for practical high-energy long-cycling lithium metal batteries (2019, background): “The steep concentration gradients at the Li/electrolyte interface accelerate the growth of long, fibrous, dendritic Li18, which has a high risk of shorting the cells.”