Voice conversion (VC) aims to convert the voice from a source speaker to a target speaker without modifying the linguistic content. Zero-shot voice conversion has attracted significant attention in the task of VC because it can achieve conversion for speakers who did not appear during the training stage. Despite the significant progress made by previous methods in zero-shot VC, there is still room for improvement in separating speaker information and content information. In this paper, we propose a zero-shot VC method based on feature disentanglement. The proposed model uses a speaker encoder for extracting speaker embeddings, introduces mixed speaker layer normalization to eliminate residual speaker information in content encoding, and employs adaptive attention weight normalization for conversion. Furthermore, dynamic convolution is introduced to improve speech content modeling while requiring a small number of parameters. The experiments demonstrate that performance of the proposed model is superior to several state-of-the-art models, achieving both high similarity with the target speaker and intelligibility. In addition, the decoding speed of our model is much higher than the existing state-of-the-art models.