Constructing a Protective Pillaring Layer by Incorporating Gradient Mn4+ to Stabilize the Surface/Interfacial Structure of LiNi0.815Co0.15Al0.035O2 Cathode

• DOI: 10.1021/acsami.8b10372
• Publication Date: 2018-07-31T21:26:30Z
• Authors: Chun-Liu Xu; Wei Xiang; Zhen-Guo Wu; Ya-Di Xu; Yong-Chun Li; Ming-Zhe Chen; Guo XiaoDong; Gen-Pin Lv; Jun Zhang; Ben-He Zhong
• Keywords: Non-blocking I/O; Degradation; Particle (ecology); Structural Stability

Nickel-rich layered oxides are regarded as very promising materials cathodes for lithium-ion batteries because of their environmental benignancy, low cost, and high energy density. However, insufficient cycle performance poor thermotic characteristics induced by structural degradation at potentials elevated temperatures pose challenging hurdles nickel-rich cathodes. Here, a protective pillaring layer, in which partial Ni2+ ions occupy Li slabs gradient Mn4+, is integrated into the primary particle LiNi0.815Co0.15Al0.035O2 to stabilize surface/interfacial structure. With stable outer surface provided enriched Mn4+ concentration pillar effect NiO-like phase, Mn-incorporated quaternary show enhanced stability improved Li+ diffusion well lithium-storage properties. Compared with severe capacity fade pure structure, cathode exhibits more cycling behavior retention 80.0% after 500 cycles 5.0 C.