▎ 摘　　要

NOVELTY - Negative pole piece comprises negative electrode current collector, first negative electrode active material layer, and second negative electrode active material layer. The first negative electrode active material layer is positioned between the second negative electrode active material layer and the negative electrode current collector in the thickness direction of the negative electrode plate. The first negative electrode active material layer includes a first negative electrode active material. The second negative electrode active material layer includes a second negative electrode active material. The interlayer spacing of the first negative electrode active material is smaller than the interlayer spacing of the second negative electrode active material. USE - Negative pole piece for use in battery cell (claimed). ADVANTAGE - The negative pole piece has improved conductivity of the electrode sheet by undercoat layer, and improved the cycle performance and the rate capability of the battery on the basis that the volume energy density of the battery by large interlayer spacing and the small interlayer spacing are matched with each other. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a battery cell, which comprises: a positive pole piece, a separator, and a negative pole piece.