Mechanistic insight into the impact of pre-lithiation on the cycling stability of lithium-ion battery

Li2Cu0.1Ni0.9O2 with Copper Substitution: A New Cathode Prelithiation Additive for Lithium-Ion Batteries

“…In addition, the cycling performance with LCNO additive in the full cell is more stable than that of the pristine (Figure d). It may attribute to the formation of stable cathode electrolyte interphases on the surface of NCM811 brought by cathode prelithiation additive activation. , Besides, recent studies proved that prelithiation could enhance the structural stability of SEI from anodes with slight volume changes. , Figure S14 shows the electrochemical properties of graphite/NCM811 full-cells with different contents of LCNO additives. The cell with 20% additive reveals a remarkable charge capacity for the initial cycle, but the discharge capacity is severely deteriorated (Figure S14a).…”

“…42,48 Besides, recent studies proved that prelithiation could enhance the structural stability of SEI from anodes with slight volume changes. 49,50 Figure S14 shows the electrochemical properties of graphite/NCM811 full-cells with different contents of LCNO additives. The cell with 20% additive reveals a remarkable charge capacity for the initial cycle, but the discharge capacity is severely deteriorated (Figure S14a).…”

Cobalt-Doped Spinel Cathode for High-Power Lithium-Ion Batteries Toward Expanded Low-Temperature Applications

“…Due to the lower lithiation potential (<100 mV) of graphite, the excess lithium ions extracted from the cathode would form lithium deposits on the surface of graphite during charging. It can not only sacrifice a large number of lithium ions but also induce Li dendrite growth, which further causes the internal short-circuiting and safety issues. − Thus, when assembling a LNMO-0.1Co/graphite full cell, the ratio of negative capacity to positive capacity is 1.1 to 1.15, and the galvanostatic charge/discharge test is performed at a voltage window of 3.3–4.8 V. On the other hand, since the graphite lithium precipitation problem is detrimental to the full cell cycle, LNMO-0.1Co and graphite were pre-lithiated in half cells separately at 0.2 C for 5 cycles and then assembled into the full cell. − The electrochemical performance of the pre-cycled assembled LNMO-0.1Co/graphite full cell at both 1 C (Figure ) and 0.2 C (Figure S7, Supporting Information) was significantly superior to the full cell without pre-cycling (Figure S6, Supporting Information) (an initial discharge capacity of 96 mA h g –1 , an average Coulombic efficiency of 99.09%, and a capacity retention of 78.12%). The full cell has a discharge voltage plateau at about 4.5 V (Figure a) and a discharge specific capacity of 111.7 mA h g –1 for the first cycle at 1 C, comparable to 110 mA h g –1 at 0.2 C (Figure S6, Supporting Information), and the capacity retention rate improved from 96.09% at 0.2 C (Figure S7a, Supporting Information) to 98.03% at 1 C (Figure b).…”

A Molecularly Engineered Cathode Lithium Compensation Agent for High Energy Density Batteries

“…Prelithiation technology is regarded as a practical method for promoting the energy density and cycle life. [ 5 ] Many prelithiation methods have been explored such as electrochemical, chemical and physical prelithiation. [ 6 ] Among them, few strategies can be industrializable due to the incompatibility with the current battery manufacturing process.…”

“…Blending Li compensation materials in anode or cathode is an easily adaptable method. [ 5,7 ] Anode Li compensation typically use high reactive lithium foil or powder, which set high bars for processing safety and industrialization accessibility. [ 8 ] Cathode Li compensation agents may provide versatile solutions for high energy density battery in terms of safety, manufacturing and cost.…”